build: front back - update Traefik to v3.6 (latest stable)

- Updated from v3.0 to v3.6.1 for Docker API compatibility
- Includes automatic API version negotiation
- Better performance and security fixes

Author: HMarzban

docker-compose.prod.yml

@@ -28,7 +28,7 @@ services:
  # Dynamic config: ./scripts/traefik/dynamic/
  # ===========================================================================
  traefik:
-  image: traefik:v3.0
+  image: traefik:v3.6
   container_name: traefik
   restart: unless-stopped
   command: