fix port already use on server

docker-compose.prod.yml

@@ -59,7 +59,7 @@ services:
     container_name: ckb-nginx-proxy
     restart: unless-stopped
     ports:
-      - "80:80"
+      - "8081:80"
       - "443:443"
     volumes:
       - ./docker/nginx-proxy.conf:/etc/nginx/nginx.conf:ro