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/css-tree/lib/parser/index.js

@@ -0,0 +1,4 @@
+import { createParser } from './create.js';
+import config from '../syntax/config/parser.js';
+
+export default createParser(config);