This First Script was a "clone" of the oficial ubuntu nginx web2py Script:
https://github.com/web2py/web2py/blob/master/scripts/setup-web2py-nginx-uwsgi-ubuntu.sh
But set for Python3 envireonment.
Also deserves credit this link, where I have grabbed the solution for Python3:
https://www.tengiz.net/bootlepy-nginx-uwsgi-python3-with-virtualenv-on-debian/
Please constribute and better the code!