docs: improve guest creation documentation

[jsturtevant]

Add a few more directions to readme and add some trouble shooting.

addresses #1191

[ludfjig]

LGTM. What do you think about adding a minimal (weekly?) test that tries to compile a minimal guest like the one I posted in #1175 using cargo-hyperlight? Maybe we can also link to it from the docs to show what a minimal guest looks like. I think it could be useful, and by making it weekly, we don't slow down existing stuff like just guests

[jsturtevant]

LGTM. What do you think about adding a minimal (weekly?) test that tries to compile a minimal guest like the one I posted in #1175 using cargo-hyperlight?

Yea, maybe using the code from the readme would be a good thing since it isn't currently tested as is

[dblnz]

LGTM. What do you think about adding a minimal (weekly?) test that tries to compile a minimal guest like the one I posted in #1175 using cargo-hyperlight? Maybe we can also link to it from the docs to show what a minimal guest looks like. I think it could be useful, and by making it weekly, we don't slow down existing stuff like just guests

Wouldn't the cargo-hyperlight repository be a better match for this?