Rename Webpack config to official recommendation

Signed-off-by: David Mehren <dmehren1@gmail.com>

webpack.prod.js

@@ -0,0 +1,75 @@
+var baseConfig = require('./webpack.common')
+var webpack = require('webpack')
+var path = require('path')
+const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin')
+const UglifyJsPlugin = require('uglifyjs-webpack-plugin')
+const MiniCssExtractPlugin = require('mini-css-extract-plugin')
+
+module.exports = [Object.assign({}, baseConfig, {
+  plugins: baseConfig.plugins.concat([
+    new webpack.DefinePlugin({
+      'process.env': {
+        'NODE_ENV': JSON.stringify('production')
+      }
+    })
+  ]),
+
+  optimization: {
+    minimizer: [
+      new UglifyJsPlugin({
+        parallel: true,
+        cache: true
+      })
+    ],
+    splitChunks: {
+      chunks: 'async',
+      minChunks: Infinity
+    }
+  },
+
+  output: {
+    path: path.join(__dirname, 'public/build'),
+    publicPath: '/build/',
+    filename: '[id].[name].[hash].js'
+    // baseUrl: '<%- url %>'
+  }
+}), {
+  // This Chunk is used in the 'save as html' feature.
+  // It is embedded in the html file and contains CSS for styling.
+
+  entry: {
+    htmlExport: path.join(__dirname, 'public/js/htmlExport.js')
+  },
+
+  output: {
+    path: path.join(__dirname, 'public/build'),
+    publicPath: '/build/',
+    filename: '[name].js'
+  },
+  plugins: [
+    new webpack.DefinePlugin({
+      'process.env': {
+        'NODE_ENV': JSON.stringify('production')
+      }
+    }),
+    new MiniCssExtractPlugin({
+      filename: 'html.min.css'
+    })
+  ],
+
+  optimization: {
+    minimizer: [
+      new OptimizeCSSAssetsPlugin({})
+    ]
+  },
+
+  module: {
+    rules: [{
+      test: /\.css$/,
+      use: [
+        MiniCssExtractPlugin.loader,
+        'css-loader'
+      ]
+    }]
+  }
+}]