SOLVED - Nginx Config Ubuntu 16.04

Troubleshooting
6

The mattermost manual refers to this IP address:

upstream backend {
server 10.10.10.2:8065;
}

(https://docs.mattermost.com/install/config-proxy-nginx.html)

What IP address should I use if Nginx runs on the same machine as the mattermost server?

Or what IP address should I actually put here?

I am currently trying it with 127.0.0.1 but that might be wrong?