webamp/webpack.production.config.js

const config = require('./webpack.config');
const webpack = require('webpack');

config.plugins = (config.plugins || []).concat([
  new webpack.DefinePlugin({
    'process.env': {
      'NODE_ENV': JSON.stringify('production')
    }
  }),
  new webpack.optimize.UglifyJsPlugin()
]);

module.exports = config;