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/env/constants.js

@@ -0,0 +1,19 @@
+const CLIENT_VIRTUAL_MODULE_ID = "astro:env/client";
+const RESOLVED_CLIENT_VIRTUAL_MODULE_ID = "\0" + CLIENT_VIRTUAL_MODULE_ID;
+const SERVER_VIRTUAL_MODULE_ID = "astro:env/server";
+const RESOLVED_SERVER_VIRTUAL_MODULE_ID = "\0" + SERVER_VIRTUAL_MODULE_ID;
+const INTERNAL_VIRTUAL_MODULE_ID = "virtual:astro:env/internal";
+const RESOLVED_INTERNAL_VIRTUAL_MODULE_ID = "\0" + INTERNAL_VIRTUAL_MODULE_ID;
+const ENV_TYPES_FILE = "env.d.ts";
+const PKG_BASE = new URL("../../", import.meta.url);
+const MODULE_TEMPLATE_URL = new URL("templates/env.mjs", PKG_BASE);
+export {
+  CLIENT_VIRTUAL_MODULE_ID,
+  ENV_TYPES_FILE,
+  INTERNAL_VIRTUAL_MODULE_ID,
+  MODULE_TEMPLATE_URL,
+  RESOLVED_CLIENT_VIRTUAL_MODULE_ID,
+  RESOLVED_INTERNAL_VIRTUAL_MODULE_ID,
+  RESOLVED_SERVER_VIRTUAL_MODULE_ID,
+  SERVER_VIRTUAL_MODULE_ID
+};