Configure eywa to start at boot

Create the script

/etc/systemd/system/eywa.service

with the following content:

[Unit]
Description=Eywa

[Service]
Type=simple
ExecStart=/usr/bin/node /usr/local/eywa/server.js -port 8443 -wsport 8444
User=root
Restart=on-failure

[Install]
WantedBy=multi-user.target

To start/stop:

systemctl start eywa
systemctl stop eywa

To enable/disable at boot:

systemctl enable eywa
systemctl disable eywa