version: "1"
services:
  counter:
    command: "sh counter.sh"

#!/bin/sh
$ i=1
$ while true; do
$     echo "Count: $i"
$     i=$((i + 1))
$     sleep 1
$ done

$ sysg start
$ sysg logs --service counter
$ sysg stop

Count: 1
Count: 2
Count: 3

version: "1"
services:
  counter:
    command: "sh counter.sh"
    restart_policy: "always"