Hi, we have setup Teamcity (version 2020.1.2) based on the official docker image (https://hub.docker.com/r/jetbrains/teamcity-server/). Apart from restoring a backup from a previous installation, we haven't made any changes to the container. We would like to upgrade to the latest version, but unfortunately Teamcity states "Auto update is turned off: not supported for the 'docker-ubuntu' distribution". Why can't I use the automatic upgrade? And what is the recommended upgrade process otherwise?