PM2

PM2 is the industry-standard production process manager for Node.js applications, featuring a built-in load balancer and 24/7 uptime monitoring.

PM2 keeps your Node.js services alive indefinitely with zero-downtime reloads and an automated process watchdog. It handles cluster mode out of the box (scaling apps across all available CPUs) and manages log aggregation, resource monitoring, and startup scripts with single-line commands. Whether you are running a small Express API or a massive microservices architecture, PM2 ensures your processes restart instantly after a crash or a system reboot.

https://pm2.keymetrics.io/