services:
  zap:
    # Use the official stable image for ZAP from Docker Hub.
    image: zaproxy/zap-stable
    container_name: zap
    ports:
      # Map the host ports to the container ports.
      - "${ZAP_UI_PORT}:8080"
    volumes:
      # Mount the named volume to the ZAP working directory.
      - ${ZAP_VOLUME_NAME}:/home/zap/.ZAP
    environment:
      # Pass environment variables to the container.
      - ZAP_AUTH_API_KEY=${ZAP_API_KEY}
    # This command starts ZAP in a daemon mode.
    command: "zap-webswing.sh -port 8080 -config api.key=${ZAP_API_KEY}"
    # Automatically restart the container if it stops.
    restart: always