Add Traefik loadbalancer port label for frontend:8080

Coolify 4.1.x omits loadbalancer.server.port when the domain has no :8080
suffix, causing Traefik 404. Explicit label targets nginx on 8080.

docker-compose.yml

@@ -202,6 +202,8 @@ services:
       timeout: 10s
       retries: 20
       start_period: 180s
+    labels:
+      - traefik.http.services.frontend.loadbalancer.server.port=8080
 
   queue-short:
     <<: *backend_defaults