It was mostly uneventful, to be honest. I downloaded the two apps (static admin and the php app), tossed them into /opt/www, and set up nginx to serve PHP. The config in the main app had a section for my Postgres settings and the docs gave the instructions on putting the default server configuration into the static site.

The only challenge was actually rather silly: I don’t use PHP so it took me a bit to understand why apt install php installed Apache when I had already installed nginx. Once I found php-fpm it was smooth sailing from there.