code: def healthy(self):
          
          try:
              if self.is_healthy():
                  return "OK", 200
  
              else:
                  return "FAIL", 500
  
          except Exception as e:
              self.app.logger.exception(e)
              return str(e), 500
docs: Return 200 is healthy, else 500.
  
          Override is_healthy() to change the health check.