fix: Fix product page syntax errors

1. Remove duplicate/broken code in product tables section
2. Fix PostCSS config for Tailwind 4
3. Add @tailwindcss/postcss dependency
4. Remove --production flag from Dockerfile (sharp required)

All fixes enable successful Docker build with favicon working.

node_modules/@babel/parser/bin/babel-parser.js

@@ -0,0 +1,15 @@
+#!/usr/bin/env node
+/* eslint-disable no-var, unicorn/prefer-node-protocol */
+
+var parser = require("..");
+var fs = require("fs");
+
+var filename = process.argv[2];
+if (!filename) {
+  console.error("no filename specified");
+} else {
+  var file = fs.readFileSync(filename, "utf8");
+  var ast = parser.parse(file);
+
+  console.log(JSON.stringify(ast, null, "  "));
+}