+> The data and log paths were not correct in the previous image. The grafana database was placed by default in /usr/share/grafana/data instead of the correct path /var/lib/grafana. This means it was not in a dir that was marked as a volume. So if you remove the container it will remove the grafana database. So before updating make sure you copy the /usr/share/grafana/data path from inside the container to the host.
Torkel Ödegaard