code: def healthcheck() -> Dict[str, str]:
      """
      Currently, all service backends must satisfy either of the following requirements to
      pass the HTTP health checks sent to it from the GCE loadbalancer: 1. Respond with a
      200 on '/'. The content does not matter. 2. Expose an arbitrary url as a readiness
      probe on the pods backing the Service.
      """
      return {"status": "ok"}
  
file_path: PySyft/packages/grid/backend/grid/main.py
imports: from typing import Dict
  from fastapi import FastAPI
  from fastapi.responses import JSONResponse
  from starlette.middleware.cors import CORSMiddleware
  from syft.protocol.data_protocol import stage_protocol_changes
  from grid.api.router import api_router
  from grid.core.config import settings
  from grid.core.node import worker
  from grid.logger.handler import get_log_handler
label_desc: Use image node_id 2 for calling a global function with example usage: healthcheck() and returns: dict