Slim images appear to be missing /bin/bash/

[Aterfax]

With respect to the existing setup on Gitlab for CI / CD container generation it might be worth getting bash added/installed to these slimmer images to save on download / storage space.

See: https://gitlab.com/singularityhub/gitlab-ci/-/issues/2#note_565508124

[vsoch]

Try:

$ docker run -it --entrypoint bash quay.io/singularity/singularity:v3.8.2-slim