webpack.config.js

const HtmlWebpackPlugin = require('html-webpack-plugin')
const MiniCssExtractPlugin = require('mini-css-extract-plugin')
const Dotenv = require('dotenv-webpack')

module.exports = {
  module: {
    rules: [
      {
        test: /\.js|jsx$/,
        exclude: /node_modules/,
        use: ['babel-loader'],
      },
      {
        test: /\.html$/,
        exclude: /node_modules/,
        use: ['html-loader'],
      },
      {
        test: /\.css|scss$/,
        exclude: /node_modules/,
        use: [
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader',
            options: {
              importLoaders: 1,
              modules: true,
            },
          },
          'sass-loader',
        ],
      },
    ],
  },
  plugins: [
    new Dotenv(),
    new MiniCssExtractPlugin({
      filename: '[name].css',
      chunkFilename: '[id].css',
    }),
    new HtmlWebpackPlugin({
      filename: 'index.html',
      template: './src/index.html',
    }),
  ],
}