PrawnOS APT Repo - PrawnOS.com
Trust the repos GPG key
wget -O - http://deb.prawnos.com/deb.prawnos.com.gpg.key | sudo apt-key add -
Add the repository to sources.list.d;
echo "deb http://deb.prawnos.com/ bullseye main" > /etc/apt/sources.list.d/deb.prawnos.com.list