nitro is a tiny process supervisor that also can be used as pid 1 on
Linux and NetBSD.

There are four main applications it is designed for:

* As init for a Linux or NetBSD machine for embedded, desktop or server
  purposes
* As init for a Linux initramfs
* As init for a Linux container (Docker/Podman/LXC/Kubernetes)
* As unprivileged supervision daemon on POSIX systems
