Impressed how quickly the reactions are in this forum. Actually, we could even add
Documentation=https://discussions.flightaware.com/t/howto-airspy-mini-piaware-dump1090-fa-configuration/44343
in the [Unit] section. 
And may I suggest a rename of the thread? It’s not very Airspy mini specific, virtually all of it also applies to the Airspy R2. I’d just leave the mini. It may change the documentation link however. Note most people find this thread through search engines.