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/astro/dist/assets/services/noop.d.ts

@@ -0,0 +1,3 @@
+import { type LocalImageService } from './service.js';
+declare const noopService: LocalImageService;
+export default noopService;