The source code is hosted on GitHub: https://github.com/MichaIng/DietPi The main website can be found at: https://dietpi.com/
The project released the new version DietPi v8.13 on January 14th, 2023.
The highlights of this version are:
NanoPi R5C: New image
mMPD security: Directed to https:// web interface
Updated versions for AmiBerry, vaultwarden, NoMachine
UrBackup backup path configurable via dietpi.txt
Better omit of informational kernel logs to console
Fixes for NanoPi M2/T2/Fire2, Pine H64, dietpi-LetsEncrypt, Readarr, Docker, myMPD, Homer and Grafana
The full release notes can be found at: https://dietpi.com/docs/releases/v8_13/