webpack.config.js

const Dotenv = require('dotenv-webpack');
const path = require('path');
const webpack = require('webpack');
const dotEnv = require('dotenv-webpack');
const CompressionPlugin = require("compression-webpack-plugin");

module.exports = {
  mode: "development",
  entry: path.join(__dirname, "/client/src/index.jsx"),
  output: {
    filename: "bundle.js",
    path: path.join(__dirname, "/client/dist/"),
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)?/,
        exclude: /(node_modules|bower_components)/,
        use: {
          loader: "babel-loader",
          options: {
            presets: [
              '@babel/preset-env',
              ['@babel/preset-react', {runtime: 'automatic'}],
            ]
          }
        },
      },
      {
        test: /\.(js|jsx)$/,
        exclude: /(node_modules|bower_components)/,
        loader: 'babel-loader',
        options: { presets: ['@babel/env', '@babel/preset-react'] },
      },
      {
        test: /\.css$/i,
        use: ['style-loader', 'css-loader'],
      },
      {
        test: /\.(png|svg|jpg|gif)$/,
        loader: "file-loader",
      }
    ],
  },
  plugins: [
    new dotEnv({
      ignoreStub: true,
    }),
    new CompressionPlugin({
      filename: "[path][base].gz",
      algorithm: "gzip",
      test: /\.js$|\.css$|\.html$/,
      threshold: 10240,
      minRatio: 0.8,
    }),
  ],
};