webpack.config.js

// webpack.config.js
const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const webpack = require('webpack');
const dotenv = require('dotenv');
dotenv.config();

module.exports = {
  entry: [
    'react-hot-loader/patch',
    'webpack-hot-middleware/client?reload=true',
    path.join(process.cwd(), './app', 'src', 'index.jsx'),
  ],
  output: {
    // path: path.join(process.cwd(), './dist'),
    publicPath: '/',
  },
  resolve: {
    extensions: ['*', '.js', '.jsx'],
  },
  devtool: 'source-map',
  module: {
    rules: [
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: [
              [
                '@babel/preset-env',
                {
                  corejs: require('core-js/package.json').version.match(
                    /^(\d+\.)?(\d+)/g,
                  )[0],
                  useBuiltIns: 'entry',
                },
              ],
              '@babel/preset-react',
            ],
          },
        },
      },
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader'],
      },
      {
        test: /\.(png|svg)$/i,
        use: [
          {
            loader: 'file-loader',
          },
        ],
      },
      {
        test: /\.js$/,
        include: /node_modules\/react-dom/,
        use: ['react-hot-loader/webpack'],
      },
    ],
  },
  plugins: [
    new webpack.HotModuleReplacementPlugin(),
    new HtmlWebpackPlugin({
      template: path.join(process.cwd(), './app', 'index.html'),
    }),
    new webpack.DefinePlugin({
      API_KEY: JSON.stringify(process.env.SHOPIFY_API_KEY),
    }),
  ],
};