webpack.config.js

const HtmlWebpackPlugin = require('html-webpack-plugin');
const path = require('path');

module.exports = {
  entry: `./client/index.js`,
  output: {
    path: path.resolve(__dirname, 'build'),
    filename: 'bundle.js',
  },
  mode: process.env.NODE_ENV,
  module: {
    rules: [
      {
        test: /\.jsx?/,
        exclude: /(node_modules)/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env', '@babel/preset-react'],
          },
        },
      },
      {
        // test: /.(css|scss)$/,
        test: /\.s?css$/,
        // test: /\.s[ac]ss$/i,
        exclude: /(node_modules)/,
        use: ['style-loader', 'css-loader', 'sass-loader'],
      },
      {
        test: /\.(gif|png|jpe?g|svg)$/i,
        use: [
          'file-loader',
          {
            loader: 'image-webpack-loader',
            options: {
              bypassOnDebug: true, // webpack@1.x
              disable: true, // webpack@2.x and newer
            },
          },
        ],
      },
    ],
  },

  plugins: [
    new HtmlWebpackPlugin({
      template: 'index.html',
      title: 'development',
    }),
  ],

  devServer: {
    static: {
      directory: path.join(__dirname, 'public'),
      publicPath: '/build',
    },
    // compress: true,
    port: 8080,
    proxy: {
      '/': 'http://localhost:3000',
    },
  },
};