It's normal for image to contain slashes

[Minizinger]

For some reason you don't allow for image with more than single slash

yair/yair.py

Line 71 in b368c6a

print("image name containes slashes", file=sys.stderr)

Which renders yair unusable for my case with images like custom-registry.com/group/subgroup/image:tag
docker allows for it, why not yair?

[yfoelling]

The main problem is, gatering the image namespace of the image specified. But feeld free to provide an PR for this issue.