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/runtime/server/scripts.d.ts

@@ -0,0 +1,5 @@
+import type { SSRResult } from '../../types/public/internal.js';
+export declare function determineIfNeedsHydrationScript(result: SSRResult): boolean;
+export declare function determinesIfNeedsDirectiveScript(result: SSRResult, directive: string): boolean;
+export type PrescriptType = 'both' | 'directive';
+export declare function getPrescripts(result: SSRResult, type: PrescriptType, directive: string): string;