webpack.config.acceptance.js

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

module.exports = Object.assign(baseConfig, {
  plugins: baseConfig.plugins.concat([
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: JSON.stringify('production')
      }
    }),
    new webpack.optimize.UglifyJsPlugin({
      minimize: true,
      compress: {
        warnings: false
      }
    })
  ])
});