Missing Image?

[ktr41n]

I followed the instructions and pulled a docker image for Ubuntu 18.04 according to the instructions here - https://github.com/ZoneMinder/zmdockerfiles

But wanted to get a more recent build. I saw that there was a Ubuntu 20.04 image I could pull here -
https://github.com/ZoneMinder/zmdockerfiles/blob/master/release/ubuntu20.04/README.md

but I dont see latest-ubuntu20.04 here - https://hub.docker.com/r/zoneminderhq/zoneminder/tags

Does this image not exist on dockerhub?