https://letsencrypt.org/docs/challenge-types/ needs to be updated. Under TLS-ALPN-01 it states that
mainstream web servers like Apache and Nginx could someday implement this
and
It’s not supported by Apache, Nginx, or Certbot, and probably won’t be soon.
In fact, Apache's mod_md
supports TLS-ALPN-01, and has for over a year.
mod_md
also supports HTTP-01 with .well-known/acme/challenge
virtualized (no need for .well-known
on disk), and DNS-01.
It's part of the httpd
distribution - and the latest version is on github.