code: def start_agent(self, cfgin=True):
          
  
          default_conf = {
              "threads": {
                  "result": {
                      "number": 0,
                      "function": None
                  },
                  "worker": {
                      "number": 0,
                      "function": None
                  },
              },
              "interval": {
                  "refresh": 900,
                  "heartbeat": 300,
                  "reporting": 300,
                  "test": 60
              },
              "heartbeat-hook": False
          }
          indata = {}
          if cfgin:
              indata = json.load(sys.stdin)
          elif os.environ.get("REFLEX_MONITOR_CONFIG"):
              indata = os.environ.get("REFLEX_MONITOR_CONFIG")
              if indata[0] != "{":
                  indata = base64.b64decode(indata)
          else:
              self.NOTIFY("Using default configuration")
  
          conf = dictlib.union(default_conf, indata)
  
          conf['threads']['result']['function'] = self.handler_thread
          conf['threads']['worker']['function'] = self.worker_thread
  
          self.NOTIFY("Starting monitor Agent")
          try:
              self.configure(conf).start()
          except KeyboardInterrupt:
              self.thread_stopper.set()
              if self.refresh_stopper:
                  self.refresh_stopper.set()
              if self.heartbeat_stopper:
                  self.heartbeat_stopper.set()
              if self.reporting_stopper:
                  self.reporting_stopper.set()
docs: CLI interface to start 12-factor service