fix(infra): guaranteed Traefik bypass for OG images and sitemaps

- Added explicit Host match and PathPrefixes to public router in docker-compose.yml.
- Increased priority of public router to 2000.
- Updated middleware.ts to bypass next-intl for OG images and API routes.
- Verified local rendering of OG images.

middleware.ts

@@ -18,7 +18,9 @@ export default function middleware(request: NextRequest) {
   if (
     pathname.startsWith('/stats') ||
     pathname.startsWith('/errors') ||
-    pathname.startsWith('/health')
+    pathname.startsWith('/health') ||
+    pathname.startsWith('/api/og') ||
+    pathname.includes('opengraph-image')
   ) {
     return;
   }