Setup KeyBox server

[gdams]

Demo'd in #806

I believe that we generally all agreed that KeyBox would be a good solution for managing SSH keys on the build farm servers.

If this is the case then I would like to request a machine that I could set this up on and perhaps provide a further demo with a small pool for test machines

[gdams]

CC @nodejs/build

[github-actions]

This issue is stale because it has been open many days with no activity. It will be closed soon unless the stale label is removed or a comment is made.

[rvagg]

ping, I'd still like this and will do it to myself in a decade or two if nobody does it before then!

[sam-github]

Yeah, its strategic, I added the never stale label.

[github-actions]

This issue is stale because it has been open many days with no activity. It will be closed soon unless the stale label is removed or a comment is made.

[mhdawson]

This was opened 2 years ago. I think we should close until we plan work in a nearish term @nodejs/build any objections to closing this for now and creating a new issue if/when we plan to work on something like this?