apt command not found in xenon-ssh image

[arnikz]

See here. There is no problem with xenon-{slurm,gridengine} images.
(related to #45)

[sverhoeven]

The xenonmiddleware/ssh image is based on https://alpinelinux.org/, it uses musl libc which probably doesn't work with the software you want to install.

[arnikz]

OK. For time being, I'll have to skip this, however, it would be good to make the xenon-* images a bit more uniform regarding the underlying images, shell etc. (related #36).