This project is not dead! Rather, this project is now maintained as a community effort at https://github.com/paperless-ngx/paperless-ngx, a direct continuation of this project and drop-in replacement. Please see their project page and the documentation at https://docs.paperless-ngx.com/ for details.
I really like Paperless NGX, have been using it for some months now, mostly for scanned paper mail, I use [0]
[0]: https://apps.apple.com/in/app/scan4paperless/id1629964055