APT packages are published under this directory. Install the signing key, then add the source list.
Recommended on Debian 12+, Ubuntu 22.04+, and newer.
sudo mkdir -p /usr/share/keyrings
sudo curl -fsSL https://googolmo.github.io/repo/keys/repo.gpg \
-o /usr/share/keyrings/repo-archive-keyring.gpg
sudo chmod 644 /usr/share/keyrings/repo-archive-keyring.gpg
sudo curl -fsSL https://googolmo.github.io/repo/ubuntu/repo.sources \
-o /etc/apt/sources.list.d/repo.sources
sudo apt update
For the one-line sources.list format, use
repo.list instead of repo.sources.