code: func (s *Service) Pull(ctx context.Context) error {
  	if s.Config().Image == "" {
  		return nil
  	}
  
  	return image.PullImage(ctx, s.clientFactory.Create(s), s.name, s.authLookup, s.Config().Image)
  }
docs: // Pull implements Service.Pull. It pulls the image of the service and skip the service that
  // would need to be built.