Unsigned (no GPG key yet) — install with [trusted=yes]:
echo "deb [trusted=yes] https://yeoblyv.github.io/diskette/apt stable main" | sudo tee /etc/apt/sources.list.d/diskette.list
sudo apt update
sudo apt install diskette
[trusted=yes] skips APT’s signature check for this repo specifically —
it does not affect any other configured repository. This is a known,
temporary gap: prefer the curl installer
or a direct release download
until the repo is signed.