webpack.config.js

const path = require('path');
const HtmlWebPackPlugin = require('html-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');

module.exports = {
  mode: 'development',
  entry: [
    './src/index.js'
  ],
  output: {
    path: __dirname + '/dist',
    publicPath: '/',
    filename: 'bundle.js'
  },
  devtool: 'source-map',
  devServer: {
    contentBase: './dist',
  },
  resolve: {
    extensions: ['.js', '.jsx', '.css'],
    modules: [path.resolve(__dirname, 'src'), 'node_modules'],
    mainFiles: ['index'],
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader'
        }
      },
      {
        test: /\.html$/,
        use: [
          {
            loader: 'html-loader'
          }
        ]
      },
      {
        test: /\.css$/i,
        use: ['style-loader', 'css-loader'],
      }
    ]
  },
  plugins: [
    new HtmlWebPackPlugin({
      template: './src/index.html',
      filename: './index.html'
    }),
    new CopyWebpackPlugin({
      patterns: [
        { from: './manifest.webmanifest' }
      ]
    })
  ]
};