webpack.config.js

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

module.exports = {
  entry: ['babel-polyfill', './src/js/index.js'],
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'js/bundle.js',
  },
  devServer: {
    contentBase: './dist',
  },
  plugins: [
    new HtmlWebpackPlugin({
      filename: 'index.html',
      template: './src/index.html',
    }),
    new Dotenv(),
  ],
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
        },
      },
      {
        test: /\.scss$/,
        use: [
          'style-loader', // creates style nodes from JS strings
          'css-loader', // translates CSS into CommonJS
          'sass-loader', // compiles Sass to CSS, using Node Sass by default
        ],
      },
    ],
  },
};