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/@tailwindcss/node/dist/esm-cache.loader.d.mts

@@ -0,0 +1,5 @@
+import { ResolveHook } from 'node:module';
+
+declare let resolve: ResolveHook;
+
+export { resolve };