Create /etc/systemd/system/wstunnel.service

[Unit]
Description=Wstunnel Server Service
After=network.target

[Service]
Type=simple
Restart=on-failure
RestartSec=5s
LimitNOFILE=1048576

ExecStart=/usr/bin/wstunnel server wss://[::]:1234 -r aabbccddeeff

[Install]
WantedBy=multi-user.target
systemctl daemon-reload

systemctl enable wstunnel.service

systemctl start wstunnel.service

systemctl status wstunnel.service