webpack.config.js

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

module.exports = {
  entry: './src/app.js',
  target: 'node',
  // exclude node_module to be bundled. If we want to use lodash, jquery,... See https://www.npmjs.com/package/webpack-node-externals
  externals: [nodeExternals()],
  output: {
    path: path.resolve(__dirname, 'bin'),
    filename: 'app.bundle.js'
  },
  module: {
    loaders: [{
      test: /\.js?$/,
      exclude: /node_modules/,
      loader: 'babel-loader'
    }]
  },
  plugins: [
    new webpack.optimize.UglifyJsPlugin({
      compress: {
        warnings: false
      },
      output: {
        comments: false
      }
    }),
    new CompressionPlugin()
  ]
}