Add shell to configuration file

[lsvmello]

Closes #300

I didn't added the logic to windows because it gets a little more complicated there. Most shell on linux uses the -c flag but on windows the flag might be completely different: /c for cmd, -NoInteractive for powershell and -c for zsh, bash and fish.

[mickael-menu]

Thank you for tackling this, and in particular for filling the documentation 👍

[mickael-menu]

Thanks again @lsvmello!