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/zod.js

@@ -0,0 +1,7 @@
+import * as mod from "zod";
+export * from "zod";
+var zod_default = mod;
+export {
+  zod_default as default,
+  mod as z
+};