Added some groundwork for showcase files.

showcase/webpack.prod.cjs

@@ -0,0 +1,9 @@
+const { merge } = require("webpack-merge");
+const webpackCommon = require("./webpack.common.cjs");
+
+
+const prodConfig = {
+    mode: "production",
+};
+
+module.exports = merge(webpackCommon, prodConfig);