echo Installing this package automatically starts and runs Caddy as a systemd service named caddy. It also comes with an optional caddy-api service which is not enabled by default, but should be used if you primarily configure Caddy via its API instead of config files.

sudo apt install -y debian-keyring debian-archive-keyring apt-transport-https
curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/gpg.key' | sudo gpg --dearmor -o /usr/share/keyrings/caddy-stable-archive-keyring.gpg
curl -1sLf 'https://dl.cloudsmith.io/public/caddy/stable/debian.deb.txt' | sudo tee /etc/apt/sources.list.d/caddy-stable.list
sudo apt update
sudo apt install caddy

echo Certificates will be saved automatically in ~/.local/share/caddy/certificates/acme-v02.api.letsencrypt.org-directory/
echo Systemctl's caddy config file: /etc/caddy/Caddyfile