Angular AOT Build with @ngtools/webapck, STEP II

package.json

{
  "scripts": {
    "start:prod:test": "npm-run-all clean build:prod:test change:hbs",
  }
}

webpack.prod.js

const webpack = require('webpack');
const webpackMerge = require('webpack-merge');
const CleanWebpackPlugin = require('clean-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const commonConfig = require('./webpack.common');
const { ENV, dir, IS_PRODUCTION } = require('./helpers');
var BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
const ngtools = require('@ngtools/webpack');
var environment = require('../src/environments/environment.prod');

module.exports = function(env) {

  var _plugins = [
    new ngtools.AotPlugin({
      tsConfigPath: 'tsconfig-aot.json',
      entryModule: dir('src', 'app', 'app.module#AppModule'),
      sourceMap: false
    }),
    new webpack.ContextReplacementPlugin(
      // The (\\|\/) piece accounts for path separators in *nix and Windows
      /angular(\\|\/)core(\\|\/)@angular/,
      dir('src')
    ),
    // Disable this when Checking for Bundle Analysis...
    // new webpack.optimize.ModuleConcatenationPlugin(),
    new webpack.optimize.CommonsChunkPlugin({
      name: ['datatable', 'main', 'polyfills'],
      minChunks: Infinity
    }),
    new HtmlWebpackPlugin({
      template: 'src/index.html',
      chunksSortMode: 'dependency',
      title: 'Quick Reports'
    }),
    new CleanWebpackPlugin(['server/dist'], {
      root: dir(),
      verbose: false,
      dry: false
    }),
    new webpack.optimize.UglifyJsPlugin({
      compress: { warnings: false }
    })
  ];

  if (IS_PRODUCTION || true) {
    _plugins.push( new BundleAnalyzerPlugin(bundleAnalyzerOpt) );
  }

  return webpackMerge(commonConfig({ env: ENV, environment: environment }), {
    devtool: 'source-map',
    entry: {
      'app': './src/bootstrap.aot.ts',
      'polyfills': './src/polyfills.ts'
    },
    module: {
      exprContextCritical: false,
      rules: [
        {
          test: /\.ts$/,
          loader: '@ngtools/webpack',
          exclude: [/\.(spec|e2e|d)\.ts$/]
        }
      ]
    },
    plugins: _plugins
  });

};

bundleAnalyzerOpt = {
  analyzerMode: 'server',
  analyzerHost: '127.0.0.1',
  analyzerPort: 8888,
  reportFilename: dir('stats','report.html'),
  defaultSizes: 'parsed',
  generateStatsFile: true,
  statsFilename: dir('stats', 'stats.json'),
  logLevel: 'warn'
}