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/toolbar.d.ts

@@ -0,0 +1,10 @@
+interface AppToggledEventPayload {
+    app: string;
+}
+export declare function eventAppToggled(options: {
+    appName: 'other' | (string & {});
+}): {
+    eventName: string;
+    payload: AppToggledEventPayload;
+}[];
+export {};