We'd love to get some help from people who are more comfortable with the debian ecosystem though! It's definitely something we want to achieve, but for the short term we had to make the decision to simply release the .deb via https://gemfury.com which provides us with free APT repo hosting for open source projects.
I understand why, but it’s indeed quite a pain.
Of course, that isn't helpful if you need to compile with extra plugins, but in that case you are probably using standard go tools and not apt packages anyway.
We were specifically told that we would need to have all our dependencies packaged. Debian needs to be able to validate that it was built entirely from source code from library packages, not from a binary built externally.
There's ongoing effort to package Caddy into Debian. Until then, this is the alternative as stopgap.
Thanks for pointing out
In case it's of interest, as a new visitor, I started browsing from your main v2 landing page, scanning down most of that information. Then I followed the prominent download and get started links near the top. I think I next went to the documentation area, and started browsing the links on the left, though I totally missed the "Install" link just under "Welcome" because my eye was drawn first to the Tutorials section and its getting started link, and then I went exploring from there on down.
I suppose that was an unfortunate combination of two things to miss. :-)