zammad/script/systemd/zammad.service

[Unit]
Description=Zammad Application

[Service]
Type=forking
User=zammad
WorkingDirectory=/home/zammad/zammad
Environment=RAILS_ENV=production
PIDFile=/var/run/zammad.puma.pid
ExecStart=puma -p 3000 -d -e production --pidfile /var/run/zammad.puma.pid

[Install]
WantedBy=multi-user.target