but do you mean the NixOS wiki at wiki.nixos.org or the NixOS wiki at nixos.wiki?
Because as a newbie, the fact there are two of them, both branded with the official logo, both active, has been confusing.
Searching "NixOS wiki Caddy" for me gives the top result as nixos.wiki which doesn't have the information you mention. The official page doesn't appear in DDG at all.
This is a big problem with NixOS IMO, as a newbie, the presence of two very similar wikis has been really confusing.