Installing prometheus snmp_exporter on a QNAP nas

I've this project in the background about creating a grafana dashboard for a QNAP nas.

As the summer is ramping up, i wanted to figure out the temperature of the nas throughout the day, so.. prometheus + grafana to the rescue!

I wrote the instructions to install snmp_exporter on a linux-based QNAP nas. For now i'm using an already existing dashboard, but it's the first step to create my own.