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/assets/fonts/infra/fontace-font-file-reader.d.ts

@@ -0,0 +1,11 @@
+import type { FontFileReader } from '../definitions.js';
+import type { Style } from '../types.js';
+export declare class FontaceFontFileReader implements FontFileReader {
+    extract({ family, url }: {
+        family: string;
+        url: string;
+    }): {
+        weight: string;
+        style: Style;
+    };
+}