Keycloak Version in a Docker Build is not Clear

It is not very clear which version of Keycloak is actually in each docker image that is packaged on docker hub. It would be nice to know exactly which version of keycloak is in use based tags or image name.

I found it finally by going to 
https://github.com/jboss-dockerfiles/keycloak/blob/master/server/Dockerfile

See Microsofts naming convention.
https://hub.docker.com/r/microsoft/dotnet