Use a vvv and www-data users/groups instead of vagrant

[tomjn]

At the moment we use vagrant as the user and group owner of a lot of stuff.

We should investigate serving and running PHP from a www-data user, with the folders owned by that user, and the possibility of logging in as a vvv user rather than a vagrant user.

This is because GH Actions and docker don't use vagrant and that user wouldn't be available

[msaggiorato]

I did some research on this during the weekend, will keep looking into it.