webpack.config.production.js

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

module.exports = {
  entry: './src/index.js',
  output: {
    filename: 'static/bundle.js',
    path: path.resolve(__dirname, 'dist'),
    publicPath: '/'
  },
  devtool: 'source-map',
  module: {
    rules: [
      {
        test: /\.jsx?$/,
        use: [
          'babel-loader',
        ],
        exclude: /node_modules/,
      },
      {
        test: /\.css$/,
        use: [
            'style-loader',
            'css-loader?modules',
            'postcss-loader',
        ],
      },
      {
        test: /\.json$/,
        use: 'json-loader'
      },
    ],
  },
  
  externals: {
      'TweenLite': 'TweenLite'
  },

  plugins: [
    new webpack.optimize.DedupePlugin(),
    new webpack.optimize.UglifyJsPlugin({
      sourceMap: true,
      comments: false
    }),
    new webpack.optimize.AggressiveMergingPlugin(),
    new CompressionPlugin({
      asset: '[path].gz[query]',
      algorithm: 'gzip',
      test: /\.js$|\.css$|\.html$/,
      threshold: 10240,
      minRatio: 0.8
    }),
  ]
}