Use exit codes instead of return to improve control flow

First of all, I just want to thank you for the work you have put into making this great tool. It helped me finally get a server on Oracle this morning! I have been trying for months so I am incredibly grateful. I would like to share a small improvement that I think improves the experience a little bit. If you replace the appropriate `return` statements at the bottom with `exit(1)` you could use a command like this in a tmux session or something: ```shell $ while true; do php ./index.php && break; done ``` That would just loop until the exit code is `0`. Same concept as the cronjob without installing anything. You could even do something like this in a systemd service file: ```yaml [Unit] Description=Oracle Cloud host capacity service After=network.target [Service] Type=oneshot ExecStart=test ! -e /tmp/flag && /usr/bin/php /home/user/index.php ExecStop=touch /tmp/flag; noti # get a notification! Restart=on-failure [Install] WantedBy=default.target RequiredBy=network.target ... ``` Please let me know if you need anything else from me. Thank you again for sharing this tool!