Well, the link you mentioned seems to be redundant. From what I can see, with the lastest version of EE, it all comes pre-configured when I choose to:
ee site create mydomain.com --wpfc
Looking at the created /nginx/sites-available/mydomain.com there are these lines:
taking care of all the steps described in your URL. Otherwise the instructions on your URL will just create error messages.
It would be great if this was mentioned in full in the documentation.