webpack.config.js

const path = require('path');

const SRC_DIR = path.join(__dirname, '/client/src');
const DIST_DIR = path.join(__dirname, '/client/dist');

module.exports = {
  mode: 'production',
  devtool: 'source-map',
  entry: `${SRC_DIR}/index.js`,
  output: {
    filename: 'bundle.js',
    path: DIST_DIR,
  },
  stats: {
    colors: true,
    errorDetails: true,
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)?/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader",
          options: {
            presets: [
              "@babel/preset-env",
              "@babel/preset-react",
            ],
            plugins: [
              ["@babel/plugin-transform-runtime",
                {
                  "regenerator": true,
                },
              ],
            ],
          },
        },
      },
      {
        test: /\.css$/,
        use: [
          'style-loader',
          {
            loader: 'css-loader',
            options: {
              importLoaders: 1,
              modules: true,
            },
          },
        ],
        include: /\.module\.css$/,
      },
      {
        test: /\.css$/,
        use: [
          'style-loader',
          'css-loader',
        ],
        exclude: /\.module\.css$/,
      },
    ],
  },
};