webpack.config.dev.js

-// Start with prod config
-const config = require('./webpack.config.prod.js');
-// Replace development with production config
+const webpack = require('webpack');
+const CompressionPlugin = require('compression-webpack-plugin');
+
+// Start with dev config
+const config = require('./webpack.config.js');
+
+// Remove local server and code map
+config.devServer = undefined;
+//config.devtool = '';
+config.mode = 'production';
+
+config.optimization = {
+    usedExports: true,
+    sideEffects: true,
+    splitChunks: {
+        chunks: 'async', // TODO possibly set to all
+        automaticNameDelimiter: '-',
+        name: true,
+    },
+};
+
+
+// Add optimization plugins
+config.plugins.push(
+    new CompressionPlugin({
+        algorithm: 'gzip',
+        test: /\.js$|\.css$|\.html$/,
+        threshold: 10240,
+        minRatio: 0.8,
+    }),
+);
+
+
+// Replace local with development server config
 config.resolve.alias.networkConfig = `${__dirname}/src/networkConfig.dev.json`;
 module.exports = config;