This is a pm2 health check middleware for the express framework. It goes through all the pm2 processes to figure out if the processes are online and responds calculating that
usage
var express = require('express');
var app = express();
var pm2HealthCheck = require('pm2-health-check');
pm2HealthCheck(app, {url: '/health-check-gizmo', optimistic: false});
this would mount the health check endpoint to the <app_host>:<app_port>/health-check-gizmo
check the travis.yml for the supported node versions of the package in the current version