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/data-patch.js

@@ -0,0 +1,6 @@
+import { createRequire } from 'module';
+
+const require = createRequire(import.meta.url);
+const patch = require('../data/patch.json');
+
+export default patch;