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Issue description

It's not directly clear what namespace one should use when building and pushing to the registry. If not mentioned, I create my own.

My lab grading failed on the pod creation, as it is looking at 'developer/custom-server'. Mine was under 'namespace/custom-server'.

One could argue that the username of the registry is also the namespace, sure, but I see that as a technicality. If not mentioned it should be free to pick, unless mentioned otherwise.

Steps to reproduce:

Expected result: