Website not found after install

I installed Ubuntu Server 20,.04 on a bare metal machine. I followed the nginx installation instructions. I have no idea if that is correct or not. Do I need to install something first?

Here’s my next dumb question: Is that machine considered the “server” of the webui?

Part 2: I logged into the machine as librenms and was placed in the correct home directory. I’ve been trying to use the, but get a not found error. In other threads, I saw that was wrong. Do I enter http:///install here?