Sametime monitoring dashboard on Docker

Sametime 12.0.1 introduced a new feature, a monitoring dashboard based on Grafana. But on Docker it was not working, in various panels, for example those related to meetings it showed “no data”. Some of us reported this to HCL and they told that a fix would be provided for FP1.
This is a companion discussion topic for the original entry at https://www.robertoboccadoro.com/2023/04/03/sametime-monitoring-dashboard-on-docker/