code: def heartbeat(request):
      
      all_checks = checks.registry.registry.get_checks(
          include_deployment_checks=not settings.DEBUG,
      )
  
      details = {}
      statuses = {}
      level = 0
  
      for check in all_checks:
          detail = heartbeat_check_detail(check)
          statuses[check.__name__] = detail['status']
          level = max(level, detail['level'])
          if detail['level'] > 0:
              details[check.__name__] = detail
  
      if level < checks.messages.WARNING:
          status_code = 200
          heartbeat_passed.send(sender=heartbeat, level=level)
      else:
          status_code = 500
          heartbeat_failed.send(sender=heartbeat, level=level)
  
      payload = {
          'status': level_to_text(level),
          'checks': statuses,
          'details': details,
      }
      return JsonResponse(payload, status=status_code)
docs: Runs all the Django checks and returns a JsonResponse with either
      a status code of 200 or 500 depending on the results of the checks.
  
      Any check that returns a warning or worse (error, critical) will
      return a 500 response.