cobbler image not documented, previous use-cases no longer documented (memtest86+-example)

[eikef]

Documentation for "cobbler image" missing

There is not really any documentation on cobbler image: https://cobbler.readthedocs.io/en/latest/cobbler.html#cobbler-image

There used to be examples on the Wiki on how to use it (for instance with memtest86+: https://github.com/cobbler/cobbler/wiki/Memtest/c908bb268589ef61ec08502d021718f69fb48cb6). That page has been removed from the Wiki in 2014, but is still referenced on the web in some places (as a search for "cobbler memtest" will attest). There may be other references on how "cobbler image" is suppose to be used that I do not know of.

Cobbler version

Cobbler 3.3.3
source: b4df371, Mon Apr 25 13:19:08 2022 +0200
build time: Fri May 6 13:25:13 2022

Operating system

AlmaLinux 8.5

[SchoolGuy]

To close this issue we have to do the following:

1. Copy the markdown content to our rst based docs in docs/
2. Test the instructions
3. Update the instructions according to the test in step 2
4. Create a PR for the work carried out in steps 1-3