services:
  factorio:
    image: ghcr.io/aconti90/factorio-headless:stable
    container_name: factorio
    restart: unless-stopped

    ports:
      - "34197:34197/udp"     # game traffic — must be reachable by players
      - "27015:27015/tcp"     # RCON — keep this on localhost or a private network

    volumes:
      - ./data:/factorio

    environment:
      NAME: "My Factorio Server"
      DESCRIPTION: "Running in Docker"
      RCON_PASSWORD: "${RCON_PASSWORD:?set RCON_PASSWORD in .env}"

      # Match the host user that owns ./data so saves stay editable.
      PUID: 1000
      PGID: 1000

    stop_grace_period: 2m     # give the server time to save before SIGKILL

    # Factorio's simulation is single-threaded; capping memory is sensible,
    # capping CPU generally is not — it just lowers achievable UPS.
    mem_limit: 4g