Explain how to use config for custom key names and paths

[erinmgraham]

Closes #846

I encountered the issue teaching on Mon and needed to generate custom named keys. I added a spoiler with the steps to add git as host to a config file because I think that will be the easiest option.

[github-actions]

Thank you!

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⏱️ Updated at 2025-05-27 04:18:55 +0000

[martinosorb]

Hi Erin. Do you think this is a common problem? Because the answer is rather technical and may confuse people with things they have no idea about, or could give the impression that this is complicated stuff. Maybe it's better to add this to the instructor notes instead, as @kekoziar suggests in the related issue? Thanks for taking care of this