Till the time Flightaware updates their documentation, you can use these as an interim solution:
For package install of piaware, dump1090-fa and dump978-fa
Scroll down to item: 3.3 - Configuration
Howto Install Piaware ver 3.8.0 on OrangePiPC / Armbian Buster
For Piaware SD card image
Scroll down to item: 6 - Configure UAT 978