artsl apt repository

Signed packages of artsl for Debian and Ubuntu, amd64 and arm64. Static binaries; no other packages needed.

sudo install -d -m 0755 /etc/apt/keyrings
curl -fsSL https://apt.mailbuttons.com/key.gpg | sudo tee /etc/apt/keyrings/mailbuttons-artsl.asc >/dev/null
echo "deb [signed-by=/etc/apt/keyrings/mailbuttons-artsl.asc] https://apt.mailbuttons.com/apt stable main" | sudo tee /etc/apt/sources.list.d/mailbuttons-artsl.list
sudo apt update && sudo apt install artsl

Then run artsl. The signing key is key.gpg; packages are in apt/pool; the index is dists/stable/InRelease.