version: "3.8"

services:
  portainer:
    image: portainer/portainer-ce:latest
    container_name: portainer
    restart: always
    ports:
      - "8000:8000"   # Edge agent
      - "9443:9443"   # Web UI (HTTPS)
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - portainer_data:/data   # <-- existing volume

volumes:
  portainer_data:
    external: true