# Install key
sudo curl -o /usr/share/keyrings/kalledk-archive.gpg 'https://kalledk.github.io/registry/deb/kalledk-archive.gpg'
# or
curl 'https://kalledk.github.io/registry/deb/kalledk-archive.asc' | sudo gpg --dearmor -o /usr/share/keyrings/kalledk-archive.gpg
# Install stable repo
echo -e "Types: deb\nURIs: https://kalledk.github.io/registry/deb\nSuites: stable\nComponents: main\nSigned-By: /usr/share/keyrings/kalledk-archive.gpg" | sudo tee /etc/apt/sources.list.d/kalledk.sources
# or
echo "deb [arch=amd64 signed-by=/usr/share/keyrings/kalledk-archive.gpg] https://kalledk.github.io/registry/deb stable main" | sudo tee /etc/apt/sources.list.d/kalledk.list
/ deb / pool