services:
  agent:
    build: .
    container_name: vps-dash-agent
    # Avoids compose creating a dedicated per-project network — on a host
    # that's accumulated enough docker networks over time, Docker's
    # auto-allocated subnet pool can run out ("all predefined address pools
    # have been fully subnetted"). This is a single-service stack with
    # nothing to reach it by container DNS name, so there's nothing lost by
    # reusing the always-present default bridge network instead.
    network_mode: bridge
    restart: unless-stopped
    ports:
      - '9090:9090'
    environment:
      # Leave unset to auto-generate a key on first run (see the container
      # logs, and data/api_key.txt on the volume below) instead of picking
      # your own.
      - API_KEY=${API_KEY:-}
    volumes:
      - agent-data:/data
      - /proc:/host/proc:ro
      - /sys:/host/sys:ro
      - /:/host/root:ro

volumes:
  agent-data: