Edwin's containers.
These containers purport to be a set of environments for comprehensive testing of a particular ecosystem.
Set of containers corresponding to distributions that have not EOL'ed. For example, debian-10, debian-11, ubuntu-20.04, ubuntu-22.04 etc.
Set of containers that correspond to a particular version of a tool. For example, a debian environment with a matrix of bash-5.2, bash-5.1, etc.