code: func validateHealthCheck(healthConfig *containertypes.HealthConfig) error {
  	if healthConfig == nil {
  		return nil
  	}
  	if healthConfig.Interval != 0 && healthConfig.Interval < containertypes.MinimumDuration {
  		return errors.Errorf("Interval in Healthcheck cannot be less than %s", containertypes.MinimumDuration)
  	}
  	if healthConfig.Timeout != 0 && healthConfig.Timeout < containertypes.MinimumDuration {
  		return errors.Errorf("Timeout in Healthcheck cannot be less than %s", containertypes.MinimumDuration)
  	}
  	if healthConfig.Retries < 0 {
  		return errors.Errorf("Retries in Healthcheck cannot be negative")
  	}
  	if healthConfig.StartPeriod != 0 && healthConfig.StartPeriod < containertypes.MinimumDuration {
  		return errors.Errorf("StartPeriod in Healthcheck cannot be less than %s", containertypes.MinimumDuration)
  	}
  	return nil
  }
docs: // validateHealthCheck validates the healthcheck params of Config