When installing via the package addon, this is the guide to follow: PiAware - dump1090 ADS-B integration with FlightAware - FlightAware
It is missing a claim link.
When not using the piaware image and not installing piaware-web there will be no page to claim your receiver.
I think when i first started, i clicked around quite a bit finally finding this page PiAware - build your own ADS-B ground station for integration with FlightAware - FlightAware
On this page there is the link mentioned to claim a new device.
So it would be very nice to add a “claim your receiver” section with the claim link (PiAware - Claim and Link a Brand New PiAware Ground Station - FlightAware) so no one else has to wander around wondering how to claim their receiver 