[Unit] Description=Photo Application After=network.target [Service] User=<app_user> Group=<app_user> WorkingDirectory=/var/lib/<app_user> Environment=FLASK_DEBUG=0 # apt-get install python3-gunicorn gunicorn ExecStart=/usr/bin/gunicorn3 --access-logfile '-' -b 127.0.0.1:8200 -w 1 <app_user>:app Restart=always [Install] WantedBy=multi-user.target