GitHub Actions usage

[foarsitter]

Add a warning for private repositories concerning the amount of build minutes consumed by new projects.

Discussed in #726

^{Originally posted by foarsitter June 25, 2021}
First of all, thanks for the effort you you all have put in to this!

Within minutes I was up and running with all the bells and whistles a developer can wish but within minutes I was out of those minutes GitHub gave me for free.

I made the mistake to create a private repository with the template. Switching to a public repo was fine for this project but a private project will soon get an expensive one I guess.

What are your thoughts about this?

Of course this are the costs of modern developments but I wasn't expect to burn my 2000 minutes in a little more of 2 hours.

[Zethson]

I am still thinking about restricting the CI & nox to only a single Python version.
Maybe we would even need a "bump python" version command or something then.

Thoughts @Imipenem ?

[Imipenem]

Fine with me, I mean during development, if there are any crucial differences for a project concerning different python versions, one would just customize it anyway to fit their needs.

For our templates we could also think about cookiecutter it like if it's a public repo use python 3.x AND 3.y and if not, just python 3.x
@Zethson