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/events/index.d.ts

@@ -0,0 +1,4 @@
+import { AstroTelemetry } from '@astrojs/telemetry';
+export declare const telemetry: AstroTelemetry;
+export * from './error.js';
+export * from './session.js';