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-scanner/index.d.ts

@@ -0,0 +1,10 @@
+import type { Plugin as VitePlugin } from 'vite';
+import type { Logger } from '../core/logger/core.js';
+import type { AstroSettings, RoutesList } from '../types/astro.js';
+interface AstroPluginScannerOptions {
+    settings: AstroSettings;
+    logger: Logger;
+    routesList: RoutesList;
+}
+export default function astroScannerPlugin({ settings, logger, routesList, }: AstroPluginScannerOptions): VitePlugin;
+export {};