Up-to-date nginx config example using subfolder?

[Anrock]

I've found nginx config on the wiki but it uses a subdomain for selfoss. I'm using DDNS so I guess I can't setup a subdomain.

There's also nginx configuration page in the wiki but it seems kinda outdated (superseded by first example I guess) and messy but it has a snippet about making selfoss work from subfolder. Unfortunetaly I wasn't able to make it work either because it's incorrect or because of my lack of understanding nginx configs - I either get default nginx 404 or just empty pages when trying to open selfoss.

Is there any recommended guide on configuring nginx to server selfoss from subfolder instead of subdomain?