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/cli/utils/format-version.d.ts

@@ -0,0 +1,8 @@
+import type { AstroVersionProvider, TextStyler } from '../definitions.js';
+interface Options {
+    name: string;
+    textStyler: TextStyler;
+    astroVersionProvider: AstroVersionProvider;
+}
+export declare function formatVersion({ name, textStyler, astroVersionProvider }: Options): string;
+export {};