multiwatch 1.0.0-rc1+really1.0.0-1build1 (arm64 binary) in ubuntu bionic

 multiwatch forks multiple instance of one application and
 keeps them running.
 .
 It is made to be used with spawn-fcgi so all forks share the same
 fastcgi socket (no webserver restart needed if you increase/decrease
 the number of forks), and it is easier to setup than multiple
 daemontool or runit supervised instances.