Add Traefik labels for domain routing and SSL

Added traefik.enable, router rules, TLS config, and loadbalancer
  settings to enable proper routing through Traefik reverse proxy.

docker-compose.yml

@@ -67,6 +67,13 @@ services:
     labels:
       - "coolify.managed=true"
       - "coolify.type=application"
+      # Traefik labels for routing
+      - "traefik.enable=true"
+      - "traefik.http.routers.backend.rule=Host(`prince2-ebook.apps.inbox.sk`)"
+      - "traefik.http.routers.backend.entrypoints=websecure"
+      - "traefik.http.routers.backend.tls=true"
+      - "traefik.http.routers.backend.tls.certresolver=letsencrypt"
+      - "traefik.http.services.backend.loadbalancer.server.port=8000"
     volumes:
       # Pre persistenciu logov a translation súborov
       - backend_logs:/app/admin-backend/logs