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/transitions/index.d.ts

@@ -0,0 +1,8 @@
+import type { TransitionDirectionalAnimations } from '../types/public/view-transitions.js';
+export { createAnimationScope } from '../runtime/server/transition.js';
+export declare function slide({ duration, }?: {
+    duration?: string | number;
+}): TransitionDirectionalAnimations;
+export declare function fade({ duration, }?: {
+    duration?: string | number;
+}): TransitionDirectionalAnimations;