webpack.config.js

const path = require('path');


module.exports = {
  mode: process.env.NODE_ENV,
  entry: './client/index.js',
  output: {
    path: path.resolve(__dirname, 'build'),
    filename: 'bundle.js',
  },
  devServer: {
    publicPath: '/build/',
    contentBase: path.resolve(__dirname, 'build'),
    proxy: {
      // /api/ works as well
      '/': 'http://localhost:3000'
    }
  },
  resolve: {
    extensions: ['.js', '.jsx', '.scss', '.gif', '.png', '.jpg', '.jpeg', '.svg']
  },
  module: {
    rules: [
      {
        test: /.jsx?$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env', '@babel/preset-react']
          }
        }
      },
      {
        test: /\.(png|jpe?g|jpg|gif)$/i,
        use: [
          {
            loader: 'file-loader',
          },
        ],
      },
      {
        test: /.(css|scss)$/,
        exclude: [/node_modules/, /client\/stylesheets\/modules/],
        use: ['style-loader', 'css-loader', 'sass-loader'],
      },
      {
        test: /\.css$/,
        loader: 'style-loader!css-loader?modules',
        include: /flexboxgrid/
      }
    ],
  }
};