References :
sudo vim /etc/supervisor/conf.d/laravel-app.ini
# and copy and paste these lines, then save it
[program:laravel-app-worker]
command=php /home/laravel-app/public_html/pheanstalk.php
autostart=true
autorestart=true
user=bob
redirect_stderr=true
stdout_logfile=/home/laravel-app/public_html/logs/worker.log
# restart the supervisor service
service supervisor restart