I did! And I didn’t see anything about Ubuntu 16 being outdated. In any case, most people will probably search Google rather than navigate a tree of links with no guarantee of finding a solution. But I understand everyone views usability differently.
DO actually has quite a few community tutorials on Caddy such as this one:
In any case, thank you for your help!. I hope I can give back to the community and perhaps I will write my own blog post about the right way to install Caddy.