kiwi from home:marcus.schaefer project

For Debian Unstable run the following:

Keep in mind that the owner of the key may distribute updates, packages and repositories that your system will trust (more information).

echo 'deb http://download.opensuse.org/repositories/home:/marcus.schaefer/Debian_Unstable/ /' | sudo tee /etc/apt/sources.list.d/home:marcus.schaefer.list
curl -fsSL https://download.opensuse.org/repositories/home:marcus.schaefer/Debian_Unstable/Release.key | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/home_marcus.schaefer.gpg > /dev/null
sudo apt update
sudo apt install kiwi