webpack.config.js

const webpack = require('webpack');

module.exports = {
  entry: './src/index.js',
  output: {
    path: __dirname + '/build',
    publicPath: '/',
    filename: 'bundle.js'
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: ['babel-loader']
      },
      {
        test: /\.json$/,
        loader: 'json-loader'
      },
      {
        test: /\.(jpe?g|gif|png|svg|woff|ttf|wav|mp3)$/,
        loader: "file-loader"
      },
    ]
  },
  node: {
    fs: 'empty',
    net: 'empty',
    tls: 'empty'
  },
  resolve: {
    extensions: ['*', '.js', '.jsx']
  },
  devServer: {
    historyApiFallback: true,
    contentBase: './'
  },
  devtool: 'source-map',
  plugins: [
    new webpack.DefinePlugin({
      'process.env.NODE_ENV': JSON.stringify(process.env.NODE_ENV),
      'process.env.API_URL': JSON.stringify(process.env.API_URL),
    })
  ],
};