How to add Node-red & Zigbee2MQTT links to side panel?
Have a look to /etc/openhab/services/runtime.cfg
There are three entries for an entry to be added e.g.:
org.openhab.core.ui.tiles:grafana-link-name=Grafana
org.openhab.core.ui.tiles:grafana-link-url=http://192.168.0.40:3000
org.openhab.core.ui.tiles:grafana-link-imageurl=data:image/png;base64,iVBORw0KGgoA........
Last row is incomplete and needs to contain a base64 encoded png image.