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/vite-plugin-html/index.d.ts

@@ -0,0 +1,8 @@
+export default function html(): {
+    name: string;
+    options(options: any): void;
+    transform(source: string, id: string): Promise<{
+        code: string;
+        map: import("magic-string").SourceMap;
+    } | undefined>;
+};