...
process.on('SIGINT', () => {
    logger.warn('SIGINT received. Shutting down…');
    process.exit(0);
  });
  process.on('SIGTERM', () => {
    logger.warn('SIGTERM received. Initiating graceful shutdown…');
    shutdown()
      .catch((err) => {
        logger.error('Ignoring error during graceful shutdown:', err);
      })
      .finally(() => {
        logger.warn('Graceful shutdown completed.');
        process.exit(0);
      });?
  });
....
module.exports = Object.assign(exposed, {
  _listen: exposed.listen,
  config,
  listen: start,
  listenAsync: startAsync,
  reset,
  setAfterShutdown: (fn) => {
    hooks.afterShutdown = fn;
  },
  setBeforeShutdown: (fn) => {
    hooks.beforeShutdown = fn;
  },
  start,
  startAsync,
  stop,
  stopAsync: promisify(stop)
});

function readyCheck() {
    let ready = true;
process.on('SIGTERM', () => {
      logger.info('SIGTERM received, making service as no longer ready');
      ready = false;
    });
return (req, res) => {
      if (ready) {
        logger.info('Successful ready check');
        res.sendStatus(200);
      } else {
        res.sendStatus(503);
        logger.info('Signaling ready check failure');
      }
    };
  }
....
router.get('/ready', readyCheck());

lifecycle:
  preStop:
    exec:
      command:
      - sleep
      - "10"

lifecycle:
  preStop:
    exec:
      command: [
        "sh", "-c",
        # Introduce a delay to the shutdown sequence to wait for the
        # pod eviction event to propagate. Then, gracefully shutdown
        # nginx.
        "sleep 5 && /usr/sbin/nginx -s quit",
      ]