Created header and the start of a shopping cart.

config/webpack.config.prod.js

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+"use strict";
+
+const webpack = require("webpack");
+const merge = require("webpack-merge");
+const OptimizeCSSAssetsPlugin = require("optimize-css-assets-webpack-plugin");
+const MiniCSSExtractPlugin = require("mini-css-extract-plugin");
+const UglifyJSPlugin = require("uglifyjs-webpack-plugin");
+const CompressionPlugin = require("compression-webpack-plugin");
+const helpers = require("./helpers");
+const commonConfig = require("./webpack.config.common");
+const isProd = process.env.NODE_ENV === "production";
+const environment = isProd
+  ? require("./env/prod.env")
+  : require("./env/staging.env");
+
+const webpackConfig = merge(commonConfig(false), {
+  mode: "production",
+  output: {
+    path: helpers.root("dist"),
+    publicPath: "/",
+    filename: "js/[name].bundle.js"
+  },
+  optimization: {
+    minimizer: [
+      new OptimizeCSSAssetsPlugin({
+        cssProcessorPluginOptions: {
+          preset: ["default", { discardComments: { removeAll: true } }]
+        }
+      }),
+      new UglifyJSPlugin({
+        cache: true,
+        parallel: false,
+        sourceMap: !isProd
+      })
+    ]
+  },
+  plugins: [
+    new webpack.EnvironmentPlugin(environment),
+    new MiniCSSExtractPlugin({
+      filename: "css/[name].css"
+    })
+  ]
+});
+
+if (!isProd) {
+  webpackConfig.devtool = "source-map";
+
+  if (process.env.npm_config_report) {
+    const BundleAnalyzerPlugin = require("webpack-bundle-analyzer")
+      .BundleAnalyzerPlugin;
+    webpackConfig.plugins.push(new BundleAnalyzerPlugin());
+  }
+}
+
+module.exports = webpackConfig;