Running a Node.js Daemon with Fastify (No PM2, No systemd)

The article explains how to run a Node.js background daemon using native fork/detach APIs and Fastify 5 for HTTP, without relying on PM2 or systemd. It covers process forking with detached mode, PID file management with stale process detection via signal-0 checks, and signal handling for clean shutdown. The approach targets CLI tools installed on end-user machines where external process managers cannot be assumed.