Update versioning scheme
As discussed on Jan 11 QA call, we want to migrate towards {version}-{builddate}
version, e.g. 2.5.5-20240118
. This is required as we sometimes need to rebuild the image between releases and we need to be able to tell which rebuild version we're using.
We discussed that it's unlikely we'll do it more than once a day, so no hhmmss needed. And in the very rare cases when we do, the chances that someone would download the image are too slim for us to bother.