webpack.config.js

const path = require('path')
const webpack = require('webpack')
const CompressionPlugin = require('compression-webpack-plugin')

module.exports = {
  entry: './src/app.js',
  output: {
    path: path.join(__dirname, 'public'),
    filename: 'bundle.js'
  },
  module: {
    rules: [{
      loader: 'babel-loader',
      test: /\.js$/,
      exclude: /node_modules/
    },
    {
      test: /\.s?css$/,
      use: [
        'style-loader',
        'css-loader',
        'sass-loader'
      ]
    }]
  },
  plugins: [
    new webpack.DefinePlugin({
      'process.env': {
        'NODE_ENV': JSON.stringify('production')
      }
    }),
    new webpack.ContextReplacementPlugin(
      /moment[\/\\]locale$/,
      /en/
    )
  ],
  devtool: 'cheap-module-eval-source-map',
  devServer: {
    contentBase: path.join(__dirname, 'public'),
    historyApiFallback: true,
    watchContentBase: true,
    hot: true,
    // open: true,
    liveReload: true
  }
};