fix(infra): correct traefik host rule syntax for public router

- Fixed invalid Traefik rule syntax in docker-compose.yml (was using raw hostname)
- Updated middleware.ts to explicitly allow localized paths
- Ensures whitelist for OG images/health checks is recognized

middleware.ts

@@ -96,5 +96,6 @@ export default function middleware(request: NextRequest) {
 export const config = {
   matcher: [
     '/((?!api|_next/static|_next/image|favicon.ico|manifest.webmanifest|.*\\.(?:svg|png|jpg|jpeg|gif|webp|pdf|txt|vcf|xml)$).*)',
+    '/(de|en)/:path*',
   ],
 };