Systemd: Creating a generic non-forking service

# /etc/systemd/system/spark-backend.service

Description=iix.se java spark backend
After=network.target

[Service]
WorkingDirectory=/srv/spark-backend
User=www-data
Group=www-data

ExecStart=/srv/spark-backend/bin/spark-backend

[Install]
WantedBy=multi-user.target