setup

config/env.js

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+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const paths = require('./paths');
+
+// Make sure that including paths.js after env.js will read .env variables.
+delete require.cache[require.resolve('./paths')];
+
+const NODE_ENV = process.env.NODE_ENV;
+if (!NODE_ENV) {
+  throw new Error(
+    'The NODE_ENV environment variable is required but was not specified.'
+  );
+}
+
+// https://github.com/bkeepers/dotenv#what-other-env-files-can-i-use
+const dotenvFiles = [
+  `${paths.dotenv}.${NODE_ENV}.local`,
+  // Don't include `.env.local` for `test` environment
+  // since normally you expect tests to produce the same
+  // results for everyone
+  NODE_ENV !== 'test' && `${paths.dotenv}.local`,
+  `${paths.dotenv}.${NODE_ENV}`,
+  paths.dotenv,
+].filter(Boolean);
+
+// Load environment variables from .env* files. Suppress warnings using silent
+// if this file is missing. dotenv will never modify any environment variables
+// that have already been set.  Variable expansion is supported in .env files.
+// https://github.com/motdotla/dotenv
+// https://github.com/motdotla/dotenv-expand
+dotenvFiles.forEach(dotenvFile => {
+  if (fs.existsSync(dotenvFile)) {
+    require('dotenv-expand')(
+      require('dotenv').config({
+        path: dotenvFile,
+      })
+    );
+  }
+});
+
+// We support resolving modules according to `NODE_PATH`.
+// This lets you use absolute paths in imports inside large monorepos:
+// https://github.com/facebook/create-react-app/issues/253.
+// It works similar to `NODE_PATH` in Node itself:
+// https://nodejs.org/api/modules.html#modules_loading_from_the_global_folders
+// Note that unlike in Node, only *relative* paths from `NODE_PATH` are honored.
+// Otherwise, we risk importing Node.js core modules into an app instead of webpack shims.
+// https://github.com/facebook/create-react-app/issues/1023#issuecomment-265344421
+// We also resolve them to make sure all tools using them work consistently.
+const appDirectory = fs.realpathSync(process.cwd());
+process.env.NODE_PATH = (process.env.NODE_PATH || '')
+  .split(path.delimiter)
+  .filter(folder => folder && !path.isAbsolute(folder))
+  .map(folder => path.resolve(appDirectory, folder))
+  .join(path.delimiter);
+
+// Grab NODE_ENV and REACT_APP_* environment variables and prepare them to be
+// injected into the application via DefinePlugin in webpack configuration.
+const REACT_APP = /^REACT_APP_/i;
+
+function getClientEnvironment(publicUrl) {
+  const raw = Object.keys(process.env)
+    .filter(key => REACT_APP.test(key))
+    .reduce(
+      (env, key) => {
+        env[key] = process.env[key];
+        return env;
+      },
+      {
+        // Useful for determining whether we’re running in production mode.
+        // Most importantly, it switches React into the correct mode.
+        NODE_ENV: process.env.NODE_ENV || 'development',
+        // Useful for resolving the correct path to static assets in `public`.
+        // For example, <img src={process.env.PUBLIC_URL + '/img/logo.png'} />.
+        // This should only be used as an escape hatch. Normally you would put
+        // images into the `src` and `import` them in code to get their paths.
+        PUBLIC_URL: publicUrl,
+        // We support configuring the sockjs pathname during development.
+        // These settings let a developer run multiple simultaneous projects.
+        // They are used as the connection `hostname`, `pathname` and `port`
+        // in webpackHotDevClient. They are used as the `sockHost`, `sockPath`
+        // and `sockPort` options in webpack-dev-server.
+        WDS_SOCKET_HOST: process.env.WDS_SOCKET_HOST,
+        WDS_SOCKET_PATH: process.env.WDS_SOCKET_PATH,
+        WDS_SOCKET_PORT: process.env.WDS_SOCKET_PORT,
+        // Whether or not react-refresh is enabled.
+        // It is defined here so it is available in the webpackHotDevClient.
+        FAST_REFRESH: process.env.FAST_REFRESH !== 'false',
+      }
+    );
+  // Stringify all values so we can feed into webpack DefinePlugin
+  const stringified = {
+    'process.env': Object.keys(raw).reduce((env, key) => {
+      env[key] = JSON.stringify(raw[key]);
+      return env;
+    }, {}),
+  };
+
+  return { raw, stringified };
+}
+
+module.exports = getClientEnvironment;

config/getHttpsConfig.js

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+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const crypto = require('crypto');
+const chalk = require('react-dev-utils/chalk');
+const paths = require('./paths');
+
+// Ensure the certificate and key provided are valid and if not
+// throw an easy to debug error
+function validateKeyAndCerts({ cert, key, keyFile, crtFile }) {
+  let encrypted;
+  try {
+    // publicEncrypt will throw an error with an invalid cert
+    encrypted = crypto.publicEncrypt(cert, Buffer.from('test'));
+  } catch (err) {
+    throw new Error(
+      `The certificate "${chalk.yellow(crtFile)}" is invalid.\n${err.message}`
+    );
+  }
+
+  try {
+    // privateDecrypt will throw an error with an invalid key
+    crypto.privateDecrypt(key, encrypted);
+  } catch (err) {
+    throw new Error(
+      `The certificate key "${chalk.yellow(keyFile)}" is invalid.\n${
+        err.message
+      }`
+    );
+  }
+}
+
+// Read file and throw an error if it doesn't exist
+function readEnvFile(file, type) {
+  if (!fs.existsSync(file)) {
+    throw new Error(
+      `You specified ${chalk.cyan(
+        type
+      )} in your env, but the file "${chalk.yellow(file)}" can't be found.`
+    );
+  }
+  return fs.readFileSync(file);
+}
+
+// Get the https config
+// Return cert files if provided in env, otherwise just true or false
+function getHttpsConfig() {
+  const { SSL_CRT_FILE, SSL_KEY_FILE, HTTPS } = process.env;
+  const isHttps = HTTPS === 'true';
+
+  if (isHttps && SSL_CRT_FILE && SSL_KEY_FILE) {
+    const crtFile = path.resolve(paths.appPath, SSL_CRT_FILE);
+    const keyFile = path.resolve(paths.appPath, SSL_KEY_FILE);
+    const config = {
+      cert: readEnvFile(crtFile, 'SSL_CRT_FILE'),
+      key: readEnvFile(keyFile, 'SSL_KEY_FILE'),
+    };
+
+    validateKeyAndCerts({ ...config, keyFile, crtFile });
+    return config;
+  }
+  return isHttps;
+}
+
+module.exports = getHttpsConfig;

config/jest/babelTransform.js

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+'use strict';
+
+const babelJest = require('babel-jest').default;
+
+const hasJsxRuntime = (() => {
+  if (process.env.DISABLE_NEW_JSX_TRANSFORM === 'true') {
+    return false;
+  }
+
+  try {
+    require.resolve('react/jsx-runtime');
+    return true;
+  } catch (e) {
+    return false;
+  }
+})();
+
+module.exports = babelJest.createTransformer({
+  presets: [
+    [
+      require.resolve('babel-preset-react-app'),
+      {
+        runtime: hasJsxRuntime ? 'automatic' : 'classic',
+      },
+    ],
+  ],
+  babelrc: false,
+  configFile: false,
+});

config/jest/cssTransform.js

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+'use strict';
+
+// This is a custom Jest transformer turning style imports into empty objects.
+// http://facebook.github.io/jest/docs/en/webpack.html
+
+module.exports = {
+  process() {
+    return 'module.exports = {};';
+  },
+  getCacheKey() {
+    // The output is always the same.
+    return 'cssTransform';
+  },
+};

config/jest/fileTransform.js

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+'use strict';
+
+const path = require('path');
+const camelcase = require('camelcase');
+
+// This is a custom Jest transformer turning file imports into filenames.
+// http://facebook.github.io/jest/docs/en/webpack.html
+
+module.exports = {
+  process(src, filename) {
+    const assetFilename = JSON.stringify(path.basename(filename));
+
+    if (filename.match(/\.svg$/)) {
+      // Based on how SVGR generates a component name:
+      // https://github.com/smooth-code/svgr/blob/01b194cf967347d43d4cbe6b434404731b87cf27/packages/core/src/state.js#L6
+      const pascalCaseFilename = camelcase(path.parse(filename).name, {
+        pascalCase: true,
+      });
+      const componentName = `Svg${pascalCaseFilename}`;
+      return `const React = require('react');
+      module.exports = {
+        __esModule: true,
+        default: ${assetFilename},
+        ReactComponent: React.forwardRef(function ${componentName}(props, ref) {
+          return {
+            $$typeof: Symbol.for('react.element'),
+            type: 'svg',
+            ref: ref,
+            key: null,
+            props: Object.assign({}, props, {
+              children: ${assetFilename}
+            })
+          };
+        }),
+      };`;
+    }
+
+    return `module.exports = ${assetFilename};`;
+  },
+};

config/modules.js

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+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const paths = require('./paths');
+const chalk = require('react-dev-utils/chalk');
+const resolve = require('resolve');
+
+/**
+ * Get additional module paths based on the baseUrl of a compilerOptions object.
+ *
+ * @param {Object} options
+ */
+function getAdditionalModulePaths(options = {}) {
+  const baseUrl = options.baseUrl;
+
+  if (!baseUrl) {
+    return '';
+  }
+
+  const baseUrlResolved = path.resolve(paths.appPath, baseUrl);
+
+  // We don't need to do anything if `baseUrl` is set to `node_modules`. This is
+  // the default behavior.
+  if (path.relative(paths.appNodeModules, baseUrlResolved) === '') {
+    return null;
+  }
+
+  // Allow the user set the `baseUrl` to `appSrc`.
+  if (path.relative(paths.appSrc, baseUrlResolved) === '') {
+    return [paths.appSrc];
+  }
+
+  // If the path is equal to the root directory we ignore it here.
+  // We don't want to allow importing from the root directly as source files are
+  // not transpiled outside of `src`. We do allow importing them with the
+  // absolute path (e.g. `src/Components/Button.js`) but we set that up with
+  // an alias.
+  if (path.relative(paths.appPath, baseUrlResolved) === '') {
+    return null;
+  }
+
+  // Otherwise, throw an error.
+  throw new Error(
+    chalk.red.bold(
+      "Your project's `baseUrl` can only be set to `src` or `node_modules`." +
+        ' Create React App does not support other values at this time.'
+    )
+  );
+}
+
+/**
+ * Get webpack aliases based on the baseUrl of a compilerOptions object.
+ *
+ * @param {*} options
+ */
+function getWebpackAliases(options = {}) {
+  const baseUrl = options.baseUrl;
+
+  if (!baseUrl) {
+    return {};
+  }
+
+  const baseUrlResolved = path.resolve(paths.appPath, baseUrl);
+
+  if (path.relative(paths.appPath, baseUrlResolved) === '') {
+    return {
+      src: paths.appSrc,
+    };
+  }
+}
+
+/**
+ * Get jest aliases based on the baseUrl of a compilerOptions object.
+ *
+ * @param {*} options
+ */
+function getJestAliases(options = {}) {
+  const baseUrl = options.baseUrl;
+
+  if (!baseUrl) {
+    return {};
+  }
+
+  const baseUrlResolved = path.resolve(paths.appPath, baseUrl);
+
+  if (path.relative(paths.appPath, baseUrlResolved) === '') {
+    return {
+      '^src/(.*)$': '<rootDir>/src/$1',
+    };
+  }
+}
+
+function getModules() {
+  // Check if TypeScript is setup
+  const hasTsConfig = fs.existsSync(paths.appTsConfig);
+  const hasJsConfig = fs.existsSync(paths.appJsConfig);
+
+  if (hasTsConfig && hasJsConfig) {
+    throw new Error(
+      'You have both a tsconfig.json and a jsconfig.json. If you are using TypeScript please remove your jsconfig.json file.'
+    );
+  }
+
+  let config;
+
+  // If there's a tsconfig.json we assume it's a
+  // TypeScript project and set up the config
+  // based on tsconfig.json
+  if (hasTsConfig) {
+    const ts = require(resolve.sync('typescript', {
+      basedir: paths.appNodeModules,
+    }));
+    config = ts.readConfigFile(paths.appTsConfig, ts.sys.readFile).config;
+    // Otherwise we'll check if there is jsconfig.json
+    // for non TS projects.
+  } else if (hasJsConfig) {
+    config = require(paths.appJsConfig);
+  }
+
+  config = config || {};
+  const options = config.compilerOptions || {};
+
+  const additionalModulePaths = getAdditionalModulePaths(options);
+
+  return {
+    additionalModulePaths: additionalModulePaths,
+    webpackAliases: getWebpackAliases(options),
+    jestAliases: getJestAliases(options),
+    hasTsConfig,
+  };
+}
+
+module.exports = getModules();

config/paths.js

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+'use strict';
+
+const path = require('path');
+const fs = require('fs');
+const getPublicUrlOrPath = require('react-dev-utils/getPublicUrlOrPath');
+
+// Make sure any symlinks in the project folder are resolved:
+// https://github.com/facebook/create-react-app/issues/637
+const appDirectory = fs.realpathSync(process.cwd());
+const resolveApp = relativePath => path.resolve(appDirectory, relativePath);
+
+// We use `PUBLIC_URL` environment variable or "homepage" field to infer
+// "public path" at which the app is served.
+// webpack needs to know it to put the right <script> hrefs into HTML even in
+// single-page apps that may serve index.html for nested URLs like /todos/42.
+// We can't use a relative path in HTML because we don't want to load something
+// like /todos/42/static/js/bundle.7289d.js. We have to know the root.
+const publicUrlOrPath = getPublicUrlOrPath(
+  process.env.NODE_ENV === 'development',
+  require(resolveApp('package.json')).homepage,
+  process.env.PUBLIC_URL
+);
+
+const buildPath = process.env.BUILD_PATH || 'build';
+
+const moduleFileExtensions = [
+  'web.mjs',
+  'mjs',
+  'web.js',
+  'js',
+  'web.ts',
+  'ts',
+  'web.tsx',
+  'tsx',
+  'json',
+  'web.jsx',
+  'jsx',
+];
+
+// Resolve file paths in the same order as webpack
+const resolveModule = (resolveFn, filePath) => {
+  const extension = moduleFileExtensions.find(extension =>
+    fs.existsSync(resolveFn(`${filePath}.${extension}`))
+  );
+
+  if (extension) {
+    return resolveFn(`${filePath}.${extension}`);
+  }
+
+  return resolveFn(`${filePath}.js`);
+};
+
+// config after eject: we're in ./config/
+module.exports = {
+  dotenv: resolveApp('.env'),
+  appPath: resolveApp('.'),
+  appBuild: resolveApp(buildPath),
+  appPublic: resolveApp('public'),
+  appHtml: resolveApp('public/index.html'),
+  appIndexJs: resolveModule(resolveApp, 'src/index'),
+  appPackageJson: resolveApp('package.json'),
+  appSrc: resolveApp('src'),
+  appTsConfig: resolveApp('tsconfig.json'),
+  appJsConfig: resolveApp('jsconfig.json'),
+  yarnLockFile: resolveApp('yarn.lock'),
+  testsSetup: resolveModule(resolveApp, 'src/setupTests'),
+  proxySetup: resolveApp('src/setupProxy.js'),
+  appNodeModules: resolveApp('node_modules'),
+  appWebpackCache: resolveApp('node_modules/.cache'),
+  appTsBuildInfoFile: resolveApp('node_modules/.cache/tsconfig.tsbuildinfo'),
+  swSrc: resolveModule(resolveApp, 'src/service-worker'),
+  publicUrlOrPath,
+};
+
+
+
+module.exports.moduleFileExtensions = moduleFileExtensions;

config/webpack.config.js

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+"use strict";
+
+const fs = require("fs");
+const path = require("path");
+const webpack = require("webpack");
+const resolve = require("resolve");
+const HtmlWebpackPlugin = require("html-webpack-plugin");
+const CaseSensitivePathsPlugin = require("case-sensitive-paths-webpack-plugin");
+const InlineChunkHtmlPlugin = require("react-dev-utils/InlineChunkHtmlPlugin");
+const TerserPlugin = require("terser-webpack-plugin");
+const MiniCssExtractPlugin = require("mini-css-extract-plugin");
+const CssMinimizerPlugin = require("css-minimizer-webpack-plugin");
+const { WebpackManifestPlugin } = require("webpack-manifest-plugin");
+const InterpolateHtmlPlugin = require("react-dev-utils/InterpolateHtmlPlugin");
+const WorkboxWebpackPlugin = require("workbox-webpack-plugin");
+const ModuleScopePlugin = require("react-dev-utils/ModuleScopePlugin");
+const getCSSModuleLocalIdent = require("react-dev-utils/getCSSModuleLocalIdent");
+const ESLintPlugin = require("eslint-webpack-plugin");
+const paths = require("./paths");
+const modules = require("./modules");
+const getClientEnvironment = require("./env");
+const ModuleNotFoundPlugin = require("react-dev-utils/ModuleNotFoundPlugin");
+const ForkTsCheckerWebpackPlugin =
+  process.env.TSC_COMPILE_ON_ERROR === "true"
+    ? require("react-dev-utils/ForkTsCheckerWarningWebpackPlugin")
+    : require("react-dev-utils/ForkTsCheckerWebpackPlugin");
+const ReactRefreshWebpackPlugin = require("@pmmmwh/react-refresh-webpack-plugin");
+
+const createEnvironmentHash = require("./webpack/persistentCache/createEnvironmentHash");
+
+// Source maps are resource heavy and can cause out of memory issue for large source files.
+const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== "false";
+
+const reactRefreshRuntimeEntry = require.resolve("react-refresh/runtime");
+const reactRefreshWebpackPluginRuntimeEntry = require.resolve(
+  "@pmmmwh/react-refresh-webpack-plugin"
+);
+const babelRuntimeEntry = require.resolve("babel-preset-react-app");
+const babelRuntimeEntryHelpers = require.resolve(
+  "@babel/runtime/helpers/esm/assertThisInitialized",
+  { paths: [babelRuntimeEntry] }
+);
+const babelRuntimeRegenerator = require.resolve("@babel/runtime/regenerator", {
+  paths: [babelRuntimeEntry],
+});
+
+// Some apps do not need the benefits of saving a web request, so not inlining the chunk
+// makes for a smoother build process.
+const shouldInlineRuntimeChunk = process.env.INLINE_RUNTIME_CHUNK !== "false";
+
+const emitErrorsAsWarnings = process.env.ESLINT_NO_DEV_ERRORS === "true";
+const disableESLintPlugin = process.env.DISABLE_ESLINT_PLUGIN === "true";
+
+const imageInlineSizeLimit = parseInt(
+  process.env.IMAGE_INLINE_SIZE_LIMIT || "10000"
+);
+
+// Check if TypeScript is setup
+const useTypeScript = fs.existsSync(paths.appTsConfig);
+
+// Check if Tailwind config exists
+const useTailwind = fs.existsSync(
+  path.join(paths.appPath, "tailwind.config.js")
+);
+
+// Get the path to the uncompiled service worker (if it exists).
+const swSrc = paths.swSrc;
+
+// style files regexes
+const cssRegex = /\.css$/;
+const cssModuleRegex = /\.module\.css$/;
+const sassRegex = /\.(scss|sass)$/;
+const sassModuleRegex = /\.module\.(scss|sass)$/;
+const lessRegex = /\.(less)$/;
+const lessModuleRegex = /\.module\.(less)$/;
+
+const hasJsxRuntime = (() => {
+  if (process.env.DISABLE_NEW_JSX_TRANSFORM === "true") {
+    return false;
+  }
+
+  try {
+    require.resolve("react/jsx-runtime");
+    return true;
+  } catch (e) {
+    return false;
+  }
+})();
+
+// This is the production and development configuration.
+// It is focused on developer experience, fast rebuilds, and a minimal bundle.
+module.exports = function (webpackEnv) {
+  const isEnvDevelopment = webpackEnv === "development";
+  const isEnvProduction = webpackEnv === "production";
+
+  // Variable used for enabling profiling in Production
+  // passed into alias object. Uses a flag if passed into the build command
+  const isEnvProductionProfile =
+    isEnvProduction && process.argv.includes("--profile");
+
+  // We will provide `paths.publicUrlOrPath` to our app
+  // as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
+  // Omit trailing slash as %PUBLIC_URL%/xyz looks better than %PUBLIC_URL%xyz.
+  // Get environment variables to inject into our app.
+  const env = getClientEnvironment(paths.publicUrlOrPath.slice(0, -1));
+
+  const shouldUseReactRefresh = env.raw.FAST_REFRESH;
+
+  // common function to get style loaders
+  const getStyleLoaders = (cssOptions, preProcessor) => {
+    const loaders = [
+      isEnvDevelopment && require.resolve("style-loader"),
+      isEnvProduction && {
+        loader: MiniCssExtractPlugin.loader,
+        // css is located in `static/css`, use '../../' to locate index.html folder
+        // in production `paths.publicUrlOrPath` can be a relative path
+        options: paths.publicUrlOrPath.startsWith(".")
+          ? { publicPath: "../../" }
+          : {},
+      },
+      {
+        loader: require.resolve("css-loader"),
+        options: cssOptions,
+      },
+      {
+        // Options for PostCSS as we reference these options twice
+        // Adds vendor prefixing based on your specified browser support in
+        // package.json
+        loader: require.resolve("postcss-loader"),
+        options: {
+          postcssOptions: {
+            // Necessary for external CSS imports to work
+            // https://github.com/facebook/create-react-app/issues/2677
+            ident: "postcss",
+            config: false,
+            plugins: !useTailwind
+              ? [
+                  "postcss-flexbugs-fixes",
+                  [
+                    "postcss-preset-env",
+                    {
+                      autoprefixer: {
+                        flexbox: "no-2009",
+                      },
+                      stage: 3,
+                    },
+                  ],
+                  // Adds PostCSS Normalize as the reset css with default options,
+                  // so that it honors browserslist config in package.json
+                  // which in turn let's users customize the target behavior as per their needs.
+                  "postcss-normalize",
+                ]
+              : [
+                  "tailwindcss",
+                  "postcss-flexbugs-fixes",
+                  [
+                    "postcss-preset-env",
+                    {
+                      autoprefixer: {
+                        flexbox: "no-2009",
+                      },
+                      stage: 3,
+                    },
+                  ],
+                ],
+          },
+          sourceMap: isEnvProduction ? shouldUseSourceMap : isEnvDevelopment,
+        },
+      },
+    ].filter(Boolean);
+    if (preProcessor) {
+      loaders.push(
+        {
+          loader: require.resolve("resolve-url-loader"),
+          options: {
+            sourceMap: isEnvProduction ? shouldUseSourceMap : isEnvDevelopment,
+            root: paths.appSrc,
+          },
+        },
+        {
+          loader: require.resolve(preProcessor),
+          options: {
+            sourceMap: true,
+          },
+        }
+      );
+    }
+    return loaders;
+  };
+
+  return {
+    target: ["browserslist"],
+    // Webpack noise constrained to errors and warnings
+    stats: "errors-warnings",
+    mode: isEnvProduction ? "production" : isEnvDevelopment && "development",
+    // Stop compilation early in production
+    bail: isEnvProduction,
+    devtool: isEnvProduction
+      ? shouldUseSourceMap
+        ? "source-map"
+        : false
+      : isEnvDevelopment && "cheap-module-source-map",
+    // These are the "entry points" to our application.
+    // This means they will be the "root" imports that are included in JS bundle.
+    entry: paths.appIndexJs,
+    output: {
+      // The build folder.
+      path: paths.appBuild,
+      // Add /* filename */ comments to generated require()s in the output.
+      pathinfo: isEnvDevelopment,
+      // There will be one main bundle, and one file per asynchronous chunk.
+      // In development, it does not produce real files.
+      filename: isEnvProduction
+        ? "static/js/[name].[contenthash:8].js"
+        : isEnvDevelopment && "static/js/bundle.js",
+      // There are also additional JS chunk files if you use code splitting.
+      chunkFilename: isEnvProduction
+        ? "static/js/[name].[contenthash:8].chunk.js"
+        : isEnvDevelopment && "static/js/[name].chunk.js",
+      assetModuleFilename: "static/media/[name].[hash][ext]",
+      // webpack uses `publicPath` to determine where the app is being served from.
+      // It requires a trailing slash, or the file assets will get an incorrect path.
+      // We inferred the "public path" (such as / or /my-project) from homepage.
+      publicPath: paths.publicUrlOrPath,
+      // Point sourcemap entries to original disk location (format as URL on Windows)
+      devtoolModuleFilenameTemplate: isEnvProduction
+        ? (info) =>
+            path
+              .relative(paths.appSrc, info.absoluteResourcePath)
+              .replace(/\\/g, "/")
+        : isEnvDevelopment &&
+          ((info) =>
+            path.resolve(info.absoluteResourcePath).replace(/\\/g, "/")),
+    },
+    cache: {
+      type: "filesystem",
+      version: createEnvironmentHash(env.raw),
+      cacheDirectory: paths.appWebpackCache,
+      store: "pack",
+      buildDependencies: {
+        defaultWebpack: ["webpack/lib/"],
+        config: [__filename],
+        tsconfig: [paths.appTsConfig, paths.appJsConfig].filter((f) =>
+          fs.existsSync(f)
+        ),
+      },
+    },
+    infrastructureLogging: {
+      level: "none",
+    },
+    optimization: {
+      minimize: isEnvProduction,
+      minimizer: [
+        // This is only used in production mode
+        new TerserPlugin({
+          terserOptions: {
+            parse: {
+              // We want terser to parse ecma 8 code. However, we don't want it
+              // to apply any minification steps that turns valid ecma 5 code
+              // into invalid ecma 5 code. This is why the 'compress' and 'output'
+              // sections only apply transformations that are ecma 5 safe
+              // https://github.com/facebook/create-react-app/pull/4234
+              ecma: 8,
+            },
+            compress: {
+              ecma: 5,
+              warnings: false,
+              // Disabled because of an issue with Uglify breaking seemingly valid code:
+              // https://github.com/facebook/create-react-app/issues/2376
+              // Pending further investigation:
+              // https://github.com/mishoo/UglifyJS2/issues/2011
+              comparisons: false,
+              // Disabled because of an issue with Terser breaking valid code:
+              // https://github.com/facebook/create-react-app/issues/5250
+              // Pending further investigation:
+              // https://github.com/terser-js/terser/issues/120
+              inline: 2,
+            },
+            mangle: {
+              safari10: true,
+            },
+            // Added for profiling in devtools
+            keep_classnames: isEnvProductionProfile,
+            keep_fnames: isEnvProductionProfile,
+            output: {
+              ecma: 5,
+              comments: false,
+              // Turned on because emoji and regex is not minified properly using default
+              // https://github.com/facebook/create-react-app/issues/2488
+              ascii_only: true,
+            },
+          },
+        }),
+        // This is only used in production mode
+        new CssMinimizerPlugin(),
+      ],
+    },
+    resolve: {
+      // This allows you to set a fallback for where webpack should look for modules.
+      // We placed these paths second because we want `node_modules` to "win"
+      // if there are any conflicts. This matches Node resolution mechanism.
+      // https://github.com/facebook/create-react-app/issues/253
+      modules: ["node_modules", paths.appNodeModules].concat(
+        modules.additionalModulePaths || []
+      ),
+      // These are the reasonable defaults supported by the Node ecosystem.
+      // We also include JSX as a common component filename extension to support
+      // some tools, although we do not recommend using it, see:
+      // https://github.com/facebook/create-react-app/issues/290
+      // `web` extension prefixes have been added for better support
+      // for React Native Web.
+      extensions: paths.moduleFileExtensions
+        .map((ext) => `.${ext}`)
+        .filter((ext) => useTypeScript || !ext.includes("ts")),
+      alias: {
+        // Support React Native Web
+        // https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
+        "react-native": "react-native-web",
+        // Allows for better profiling with ReactDevTools
+        ...(isEnvProductionProfile && {
+          "react-dom$": "react-dom/profiling",
+          "scheduler/tracing": "scheduler/tracing-profiling",
+        }),
+        ...(modules.webpackAliases || {}),
+      },
+      plugins: [
+        // Prevents users from importing files from outside of src/ (or node_modules/).
+        // This often causes confusion because we only process files within src/ with babel.
+        // To fix this, we prevent you from importing files out of src/ -- if you'd like to,
+        // please link the files into your node_modules/ and let module-resolution kick in.
+        // Make sure your source files are compiled, as they will not be processed in any way.
+        new ModuleScopePlugin(paths.appSrc, [
+          paths.appPackageJson,
+          reactRefreshRuntimeEntry,
+          reactRefreshWebpackPluginRuntimeEntry,
+          babelRuntimeEntry,
+          babelRuntimeEntryHelpers,
+          babelRuntimeRegenerator,
+        ]),
+      ],
+    },
+    module: {
+      strictExportPresence: true,
+      rules: [
+        // Handle node_modules packages that contain sourcemaps
+        shouldUseSourceMap && {
+          enforce: "pre",
+          exclude: /@babel(?:\/|\\{1,2})runtime/,
+          test: /\.(js|mjs|jsx|ts|tsx|css)$/,
+          loader: require.resolve("source-map-loader"),
+        },
+        {
+          // "oneOf" will traverse all following loaders until one will
+          // match the requirements. When no loader matches it will fall
+          // back to the "file" loader at the end of the loader list.
+          oneOf: [
+            // TODO: Merge this config once `image/avif` is in the mime-db
+            // https://github.com/jshttp/mime-db
+            {
+              test: [/\.avif$/],
+              type: "asset",
+              mimetype: "image/avif",
+              parser: {
+                dataUrlCondition: {
+                  maxSize: imageInlineSizeLimit,
+                },
+              },
+            },
+            // "url" loader works like "file" loader except that it embeds assets
+            // smaller than specified limit in bytes as data URLs to avoid requests.
+            // A missing `test` is equivalent to a match.
+            {
+              test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
+              type: "asset",
+              parser: {
+                dataUrlCondition: {
+                  maxSize: imageInlineSizeLimit,
+                },
+              },
+            },
+            {
+              test: /\.svg$/,
+              use: [
+                {
+                  loader: require.resolve("@svgr/webpack"),
+                  options: {
+                    prettier: false,
+                    svgo: false,
+                    svgoConfig: {
+                      plugins: [{ removeViewBox: false }],
+                    },
+                    titleProp: true,
+                    ref: true,
+                  },
+                },
+                {
+                  loader: require.resolve("file-loader"),
+                  options: {
+                    name: "static/media/[name].[hash].[ext]",
+                  },
+                },
+              ],
+              issuer: {
+                and: [/\.(ts|tsx|js|jsx|md|mdx)$/],
+              },
+            },
+            // Process application JS with Babel.
+            // The preset includes JSX, Flow, TypeScript, and some ESnext features.
+            {
+              test: /\.(js|mjs|jsx|ts|tsx)$/,
+              include: paths.appSrc,
+              loader: require.resolve("babel-loader"),
+              options: {
+                customize: require.resolve(
+                  "babel-preset-react-app/webpack-overrides"
+                ),
+                presets: [
+                  [
+                    require.resolve("babel-preset-react-app"),
+                    {
+                      runtime: hasJsxRuntime ? "automatic" : "classic",
+                    },
+                  ],
+                ],
+
+                plugins: [
+                  isEnvDevelopment &&
+                    shouldUseReactRefresh &&
+                    require.resolve("react-refresh/babel"),
+                ].filter(Boolean),
+                // This is a feature of `babel-loader` for webpack (not Babel itself).
+                // It enables caching results in ./node_modules/.cache/babel-loader/
+                // directory for faster rebuilds.
+                cacheDirectory: true,
+                // See #6846 for context on why cacheCompression is disabled
+                cacheCompression: false,
+                compact: isEnvProduction,
+              },
+            },
+            // Process any JS outside of the app with Babel.
+            // Unlike the application JS, we only compile the standard ES features.
+            {
+              test: /\.(js|mjs)$/,
+              exclude: /@babel(?:\/|\\{1,2})runtime/,
+              loader: require.resolve("babel-loader"),
+              options: {
+                babelrc: false,
+                configFile: false,
+                compact: false,
+                presets: [
+                  [
+                    require.resolve("babel-preset-react-app/dependencies"),
+                    { helpers: true },
+                  ],
+                ],
+                cacheDirectory: true,
+                // See #6846 for context on why cacheCompression is disabled
+                cacheCompression: false,
+
+                // Babel sourcemaps are needed for debugging into node_modules
+                // code.  Without the options below, debuggers like VSCode
+                // show incorrect code and set breakpoints on the wrong lines.
+                sourceMaps: shouldUseSourceMap,
+                inputSourceMap: shouldUseSourceMap,
+              },
+            },
+            // "postcss" loader applies autoprefixer to our CSS.
+            // "css" loader resolves paths in CSS and adds assets as dependencies.
+            // "style" loader turns CSS into JS modules that inject <style> tags.
+            // In production, we use MiniCSSExtractPlugin to extract that CSS
+            // to a file, but in development "style" loader enables hot editing
+            // of CSS.
+            // By default we support CSS Modules with the extension .module.css
+            {
+              test: cssRegex,
+              exclude: cssModuleRegex,
+              use: getStyleLoaders({
+                importLoaders: 1,
+                sourceMap: isEnvProduction
+                  ? shouldUseSourceMap
+                  : isEnvDevelopment,
+                modules: {
+                  mode: "icss",
+                },
+              }),
+              // Don't consider CSS imports dead code even if the
+              // containing package claims to have no side effects.
+              // Remove this when webpack adds a warning or an error for this.
+              // See https://github.com/webpack/webpack/issues/6571
+              sideEffects: true,
+            },
+            // Adds support for CSS Modules (https://github.com/css-modules/css-modules)
+            // using the extension .module.css
+            {
+              test: cssModuleRegex,
+              use: getStyleLoaders({
+                importLoaders: 1,
+                sourceMap: isEnvProduction
+                  ? shouldUseSourceMap
+                  : isEnvDevelopment,
+                modules: {
+                  mode: "local",
+                  getLocalIdent: getCSSModuleLocalIdent,
+                },
+              }),
+            },
+            // Opt-in support for SASS (using .scss or .sass extensions).
+            // By default we support SASS Modules with the
+            // extensions .module.scss or .module.sass
+            {
+              test: sassRegex,
+              exclude: sassModuleRegex,
+              use: getStyleLoaders(
+                {
+                  importLoaders: 3,
+                  sourceMap: isEnvProduction
+                    ? shouldUseSourceMap
+                    : isEnvDevelopment,
+                  modules: {
+                    mode: "icss",
+                  },
+                },
+                "sass-loader"
+              ),
+              // Don't consider CSS imports dead code even if the
+              // containing package claims to have no side effects.
+              // Remove this when webpack adds a warning or an error for this.
+              // See https://github.com/webpack/webpack/issues/6571
+              sideEffects: true,
+            },
+            // Adds support for CSS Modules, but using SASS
+            // using the extension .module.scss or .module.sass
+            {
+              test: sassModuleRegex,
+              use: getStyleLoaders(
+                {
+                  importLoaders: 3,
+                  sourceMap: isEnvProduction
+                    ? shouldUseSourceMap
+                    : isEnvDevelopment,
+                  modules: {
+                    mode: "local",
+                    getLocalIdent: getCSSModuleLocalIdent,
+                  },
+                },
+                "sass-loader"
+              ),
+            },
+            // "file" loader makes sure those assets get served by WebpackDevServer.
+            // When you `import` an asset, you get its (virtual) filename.
+            // In production, they would get copied to the `build` folder.
+            // This loader doesn't use a "test" so it will catch all modules
+            // that fall through the other loaders.
+            {
+              // Exclude `js` files to keep "css" loader working as it injects
+              // its runtime that would otherwise be processed through "file" loader.
+              // Also exclude `html` and `json` extensions so they get processed
+              // by webpacks internal loaders.
+              exclude: [/^$/, /\.(js|mjs|jsx|ts|tsx)$/, /\.html$/, /\.json$/],
+              type: "asset/resource",
+            },
+            // ** STOP ** Are you adding a new loader?
+            // Make sure to add the new loader(s) before the "file" loader.
+          ],
+        },
+      ].filter(Boolean),
+    },
+    plugins: [
+      // Generates an `index.html` file with the <script> injected.
+      new HtmlWebpackPlugin(
+        Object.assign(
+          {},
+          {
+            inject: true,
+            template: paths.appHtml,
+          },
+          isEnvProduction
+            ? {
+                minify: {
+                  removeComments: true,
+                  collapseWhitespace: true,
+                  removeRedundantAttributes: true,
+                  useShortDoctype: true,
+                  removeEmptyAttributes: true,
+                  removeStyleLinkTypeAttributes: true,
+                  keepClosingSlash: true,
+                  minifyJS: true,
+                  minifyCSS: true,
+                  minifyURLs: true,
+                },
+              }
+            : undefined
+        )
+      ),
+      // Inlines the webpack runtime script. This script is too small to warrant
+      // a network request.
+      // https://github.com/facebook/create-react-app/issues/5358
+      isEnvProduction &&
+        shouldInlineRuntimeChunk &&
+        new InlineChunkHtmlPlugin(HtmlWebpackPlugin, [/runtime-.+[.]js/]),
+      // Makes some environment variables available in index.html.
+      // The public URL is available as %PUBLIC_URL% in index.html, e.g.:
+      // <link rel="icon" href="%PUBLIC_URL%/favicon.ico">
+      // It will be an empty string unless you specify "homepage"
+      // in `package.json`, in which case it will be the pathname of that URL.
+      new InterpolateHtmlPlugin(HtmlWebpackPlugin, env.raw),
+      // This gives some necessary context to module not found errors, such as
+      // the requesting resource.
+      new ModuleNotFoundPlugin(paths.appPath),
+      // Makes some environment variables available to the JS code, for example:
+      // if (process.env.NODE_ENV === 'production') { ... }. See `./env.js`.
+      // It is absolutely essential that NODE_ENV is set to production
+      // during a production build.
+      // Otherwise React will be compiled in the very slow development mode.
+      new webpack.DefinePlugin(env.stringified),
+      // Experimental hot reloading for React .
+      // https://github.com/facebook/react/tree/main/packages/react-refresh
+      isEnvDevelopment &&
+        shouldUseReactRefresh &&
+        new ReactRefreshWebpackPlugin({
+          overlay: false,
+        }),
+      // Watcher doesn't work well if you mistype casing in a path so we use
+      // a plugin that prints an error when you attempt to do this.
+      // See https://github.com/facebook/create-react-app/issues/240
+      isEnvDevelopment && new CaseSensitivePathsPlugin(),
+      isEnvProduction &&
+        new MiniCssExtractPlugin({
+          // Options similar to the same options in webpackOptions.output
+          // both options are optional
+          filename: "static/css/[name].[contenthash:8].css",
+          chunkFilename: "static/css/[name].[contenthash:8].chunk.css",
+        }),
+      // Generate an asset manifest file with the following content:
+      // - "files" key: Mapping of all asset filenames to their corresponding
+      //   output file so that tools can pick it up without having to parse
+      //   `index.html`
+      // - "entrypoints" key: Array of files which are included in `index.html`,
+      //   can be used to reconstruct the HTML if necessary
+      new WebpackManifestPlugin({
+        fileName: "asset-manifest.json",
+        publicPath: paths.publicUrlOrPath,
+        generate: (seed, files, entrypoints) => {
+          const manifestFiles = files.reduce((manifest, file) => {
+            manifest[file.name] = file.path;
+            return manifest;
+          }, seed);
+          const entrypointFiles = entrypoints.main.filter(
+            (fileName) => !fileName.endsWith(".map")
+          );
+
+          return {
+            files: manifestFiles,
+            entrypoints: entrypointFiles,
+          };
+        },
+      }),
+      // Moment.js is an extremely popular library that bundles large locale files
+      // by default due to how webpack interprets its code. This is a practical
+      // solution that requires the user to opt into importing specific locales.
+      // https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
+      // You can remove this if you don't use Moment.js:
+      new webpack.IgnorePlugin({
+        resourceRegExp: /^\.\/locale$/,
+        contextRegExp: /moment$/,
+      }),
+      // Generate a service worker script that will precache, and keep up to date,
+      // the HTML & assets that are part of the webpack build.
+      isEnvProduction &&
+        fs.existsSync(swSrc) &&
+        new WorkboxWebpackPlugin.InjectManifest({
+          swSrc,
+          dontCacheBustURLsMatching: /\.[0-9a-f]{8}\./,
+          exclude: [/\.map$/, /asset-manifest\.json$/, /LICENSE/],
+          // Bump up the default maximum size (2mb) that's precached,
+          // to make lazy-loading failure scenarios less likely.
+          // See https://github.com/cra-template/pwa/issues/13#issuecomment-722667270
+          maximumFileSizeToCacheInBytes: 5 * 1024 * 1024,
+        }),
+      // TypeScript type checking
+      useTypeScript &&
+        new ForkTsCheckerWebpackPlugin({
+          async: isEnvDevelopment,
+          typescript: {
+            typescriptPath: resolve.sync("typescript", {
+              basedir: paths.appNodeModules,
+            }),
+            configOverwrite: {
+              compilerOptions: {
+                sourceMap: isEnvProduction
+                  ? shouldUseSourceMap
+                  : isEnvDevelopment,
+                skipLibCheck: true,
+                inlineSourceMap: false,
+                declarationMap: false,
+                noEmit: true,
+                incremental: true,
+                tsBuildInfoFile: paths.appTsBuildInfoFile,
+              },
+            },
+            context: paths.appPath,
+            diagnosticOptions: {
+              syntactic: true,
+            },
+            mode: "write-references",
+            // profile: true,
+          },
+          issue: {
+            // This one is specifically to match during CI tests,
+            // as micromatch doesn't match
+            // '../cra-template-typescript/template/src/App.tsx'
+            // otherwise.
+            include: [
+              { file: "../**/src/**/*.{ts,tsx}" },
+              { file: "**/src/**/*.{ts,tsx}" },
+            ],
+            exclude: [
+              { file: "**/src/**/__tests__/**" },
+              { file: "**/src/**/?(*.){spec|test}.*" },
+              { file: "**/src/setupProxy.*" },
+              { file: "**/src/setupTests.*" },
+            ],
+          },
+          logger: {
+            infrastructure: "silent",
+          },
+        }),
+      !disableESLintPlugin &&
+        new ESLintPlugin({
+          // Plugin options
+          extensions: ["js", "mjs", "jsx", "ts", "tsx"],
+          formatter: require.resolve("react-dev-utils/eslintFormatter"),
+          eslintPath: require.resolve("eslint"),
+          failOnError: !(isEnvDevelopment && emitErrorsAsWarnings),
+          context: paths.appSrc,
+          cache: true,
+          cacheLocation: path.resolve(
+            paths.appNodeModules,
+            ".cache/.eslintcache"
+          ),
+          // ESLint class options
+          cwd: paths.appPath,
+          resolvePluginsRelativeTo: __dirname,
+          baseConfig: {
+            extends: [require.resolve("eslint-config-react-app/base")],
+            rules: {
+              ...(!hasJsxRuntime && {
+                "react/react-in-jsx-scope": "error",
+              }),
+            },
+          },
+        }),
+    ].filter(Boolean),
+    // Turn off performance processing because we utilize
+    // our own hints via the FileSizeReporter
+    performance: false,
+  };
+};

config/webpack/persistentCache/createEnvironmentHash.js

@@ -0,0 +1,9 @@
+'use strict';
+const { createHash } = require('crypto');
+
+module.exports = env => {
+  const hash = createHash('md5');
+  hash.update(JSON.stringify(env));
+
+  return hash.digest('hex');
+};

config/webpackDevServer.config.js

@@ -0,0 +1,127 @@
+'use strict';
+
+const fs = require('fs');
+const evalSourceMapMiddleware = require('react-dev-utils/evalSourceMapMiddleware');
+const noopServiceWorkerMiddleware = require('react-dev-utils/noopServiceWorkerMiddleware');
+const ignoredFiles = require('react-dev-utils/ignoredFiles');
+const redirectServedPath = require('react-dev-utils/redirectServedPathMiddleware');
+const paths = require('./paths');
+const getHttpsConfig = require('./getHttpsConfig');
+
+const host = process.env.HOST || '0.0.0.0';
+const sockHost = process.env.WDS_SOCKET_HOST;
+const sockPath = process.env.WDS_SOCKET_PATH; // default: '/ws'
+const sockPort = process.env.WDS_SOCKET_PORT;
+
+module.exports = function (proxy, allowedHost) {
+  const disableFirewall =
+    !proxy || process.env.DANGEROUSLY_DISABLE_HOST_CHECK === 'true';
+  return {
+    // WebpackDevServer 2.4.3 introduced a security fix that prevents remote
+    // websites from potentially accessing local content through DNS rebinding:
+    // https://github.com/webpack/webpack-dev-server/issues/887
+    // https://medium.com/webpack/webpack-dev-server-middleware-security-issues-1489d950874a
+    // However, it made several existing use cases such as development in cloud
+    // environment or subdomains in development significantly more complicated:
+    // https://github.com/facebook/create-react-app/issues/2271
+    // https://github.com/facebook/create-react-app/issues/2233
+    // While we're investigating better solutions, for now we will take a
+    // compromise. Since our WDS configuration only serves files in the `public`
+    // folder we won't consider accessing them a vulnerability. However, if you
+    // use the `proxy` feature, it gets more dangerous because it can expose
+    // remote code execution vulnerabilities in backends like Django and Rails.
+    // So we will disable the host check normally, but enable it if you have
+    // specified the `proxy` setting. Finally, we let you override it if you
+    // really know what you're doing with a special environment variable.
+    // Note: ["localhost", ".localhost"] will support subdomains - but we might
+    // want to allow setting the allowedHosts manually for more complex setups
+    allowedHosts: disableFirewall ? 'all' : [allowedHost],
+    headers: {
+      'Access-Control-Allow-Origin': '*',
+      'Access-Control-Allow-Methods': '*',
+      'Access-Control-Allow-Headers': '*',
+    },
+    // Enable gzip compression of generated files.
+    compress: true,
+    static: {
+      // By default WebpackDevServer serves physical files from current directory
+      // in addition to all the virtual build products that it serves from memory.
+      // This is confusing because those files won’t automatically be available in
+      // production build folder unless we copy them. However, copying the whole
+      // project directory is dangerous because we may expose sensitive files.
+      // Instead, we establish a convention that only files in `public` directory
+      // get served. Our build script will copy `public` into the `build` folder.
+      // In `index.html`, you can get URL of `public` folder with %PUBLIC_URL%:
+      // <link rel="icon" href="%PUBLIC_URL%/favicon.ico">
+      // In JavaScript code, you can access it with `process.env.PUBLIC_URL`.
+      // Note that we only recommend to use `public` folder as an escape hatch
+      // for files like `favicon.ico`, `manifest.json`, and libraries that are
+      // for some reason broken when imported through webpack. If you just want to
+      // use an image, put it in `src` and `import` it from JavaScript instead.
+      directory: paths.appPublic,
+      publicPath: [paths.publicUrlOrPath],
+      // By default files from `contentBase` will not trigger a page reload.
+      watch: {
+        // Reportedly, this avoids CPU overload on some systems.
+        // https://github.com/facebook/create-react-app/issues/293
+        // src/node_modules is not ignored to support absolute imports
+        // https://github.com/facebook/create-react-app/issues/1065
+        ignored: ignoredFiles(paths.appSrc),
+      },
+    },
+    client: {
+      webSocketURL: {
+        // Enable custom sockjs pathname for websocket connection to hot reloading server.
+        // Enable custom sockjs hostname, pathname and port for websocket connection
+        // to hot reloading server.
+        hostname: sockHost,
+        pathname: sockPath,
+        port: sockPort,
+      },
+      overlay: {
+        errors: true,
+        warnings: false,
+      },
+    },
+    devMiddleware: {
+      // It is important to tell WebpackDevServer to use the same "publicPath" path as
+      // we specified in the webpack config. When homepage is '.', default to serving
+      // from the root.
+      // remove last slash so user can land on `/test` instead of `/test/`
+      publicPath: paths.publicUrlOrPath.slice(0, -1),
+    },
+
+    https: getHttpsConfig(),
+    host,
+    historyApiFallback: {
+      // Paths with dots should still use the history fallback.
+      // See https://github.com/facebook/create-react-app/issues/387.
+      disableDotRule: true,
+      index: paths.publicUrlOrPath,
+    },
+    // `proxy` is run between `before` and `after` `webpack-dev-server` hooks
+    proxy,
+    onBeforeSetupMiddleware(devServer) {
+      // Keep `evalSourceMapMiddleware`
+      // middlewares before `redirectServedPath` otherwise will not have any effect
+      // This lets us fetch source contents from webpack for the error overlay
+      devServer.app.use(evalSourceMapMiddleware(devServer));
+
+      if (fs.existsSync(paths.proxySetup)) {
+        // This registers user provided middleware for proxy reasons
+        require(paths.proxySetup)(devServer.app);
+      }
+    },
+    onAfterSetupMiddleware(devServer) {
+      // Redirect to `PUBLIC_URL` or `homepage` from `package.json` if url not match
+      devServer.app.use(redirectServedPath(paths.publicUrlOrPath));
+
+      // This service worker file is effectively a 'no-op' that will reset any
+      // previous service worker registered for the same host:port combination.
+      // We do this in development to avoid hitting the production cache if
+      // it used the same host and port.
+      // https://github.com/facebook/create-react-app/issues/2272#issuecomment-302832432
+      devServer.app.use(noopServiceWorkerMiddleware(paths.publicUrlOrPath));
+    },
+  };
+};