webpack.config.js

const webpack = require('webpack');
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CompressionPlugin = require('compression-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');

const Dotenv = require('dotenv-webpack');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
require('dotenv').config();
const TerserPlugin = require("terser-webpack-plugin");


console.log('NODE_ENV', process.env.NODE_ENV);
module.exports = {
  entry: './client/src/index.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    publicPath: '/',
    filename: '[name].[contenthash].js',
  },
  devtool: process.env.NODE_ENV === 'production' ? 'source-map' : 'eval-source-map',
  mode: process.env.NODE_ENV,
  devServer: {
    host: '0.0.0.0',
    port: 3002,
    hot: true,
    historyApiFallback: true,
    static: {
      directory: path.resolve(__dirname, 'dist'),
      publicPath: '/',
    },
    headers: { 'Access-Control-Allow-Origin': '*' },
    proxy: {
      '/**': {
        target: 'http://localhost:3000/',
        secure: false,
      },
    },
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /(node_modules|bower_components)/,
        loader: 'babel-loader',
        options: { presets: ['@babel/env', '@babel/preset-react'] },
      },
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader'],
      },
      {
        test: /\.(png|jpe?g|gif|webp)$/i,
        use: [
          {
            loader: 'file-loader',
          },
        ],
      },
      {
        test: /\.scss$/,
        use: [
          'style-loader',
          'css-loader',
          {
            loader: 'postcss-loader',
            options: {
              postcssOptions: {
                plugins: () => [require('autoprefixer')],
              },
            },
          },
          'sass-loader',
        ],
      },
    ],
  },
  plugins: [
    new CopyWebpackPlugin({
      patterns: [
        { from: 'robots.txt', to: 'robots.txt' }, // Adjust the path to your robots.txt file
      ],
    }),
    new HtmlWebpackPlugin({
      favicon: path.resolve(__dirname, './client/src/images/smol-logo.png'),
      template: './client/public/index.html',
    }),
    new Dotenv(),
    new CompressionPlugin({
      filename: '[path][base].gz',
      algorithm: 'gzip',
      test: /\.(js|css|html)$/,
      threshold: 8192,
      minRatio: 0.8,
    }),
    new CleanWebpackPlugin(),
  ],
  optimization: {
    splitChunks: {
      chunks: 'all',
    },
    minimizer: [
      `...`,
      new TerserPlugin()
    ],
    runtimeChunk: 'single',
  },
};