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-astro/query.d.ts

@@ -0,0 +1,15 @@
+interface AstroQuery {
+    astro?: boolean;
+    src?: boolean;
+    type?: 'script' | 'template' | 'style' | 'custom';
+    index?: number;
+    lang?: string;
+    raw?: boolean;
+    inline?: boolean;
+}
+interface ParsedRequestResult {
+    filename: string;
+    query: AstroQuery;
+}
+export declare function parseAstroRequest(id: string): ParsedRequestResult;
+export {};