Depending on your version, run:
- Debian 11
sed -i '1s;^;deb [trusted=yes] https://packages.kubeinit.org/debian/bullseye/os/amd64 /\n;' /etc/apt/sources.list
sed -i '1s;^;deb [trusted=yes] https://packages.kubeinit.org/debian/bookworm/os/amd64 /\n;' /etc/apt/sources.list