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.js

@@ -0,0 +1,10 @@
+const EVENT_TOOLBAR_APP_TOGGLED = "ASTRO_TOOLBAR_APP_TOGGLED";
+function eventAppToggled(options) {
+  const payload = {
+    app: options.appName
+  };
+  return [{ eventName: EVENT_TOOLBAR_APP_TOGGLED, payload }];
+}
+export {
+  eventAppToggled
+};