This holds a few files to create a Debian package for Caddy - it's tailored for my own use, i.e.
using m@mdbraber.com in a few places. But feel free to send PR to make it more generic.
Builds a package from a pre-compiled binary, uses the user www-data and a systemd unit file. The
configuration is put in /etc/caddy.
Building the caddy binary is left out, we expect a precompiled binary in the local directory.