TuxMake provides curated OCI containers for each of its supported native architecture/target architecture/toolchain combinations.
These containers represent Debian-based pristine Linux kernel build environments. Notably, they do not contain TuxMake itself; TuxMake merely uses them to provide what is essentially a chroot environment in which to perform a build. The containers themselves are reusable and useful without TuxMake because they're "just" Debian images with all of the Linux kernel build prerequisites built in.
The containers are defined and built from the support/docker directory in TuxMake's git repository. They are built and published automatically using a GitLab Pipeline, as defined in TuxMake's .gitlab-ci.yml. The container builds run on a regular schedule.
The full set of TuxMake's containers can be found at hub.docker.com/u/tuxmake.