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-server/metadata.d.ts

@@ -0,0 +1,3 @@
+import type { ModuleLoader } from '../core/module-loader/index.js';
+import type { SSRResult } from '../types/public/internal.js';
+export declare function getComponentMetadata(filePath: URL, loader: ModuleLoader): Promise<SSRResult['componentMetadata']>;