I was just looking into this kind of thing for a training lab we stood up and maybe you could have some advice/clarification to offer me from working on this. W

I was just looking into this kind of thing for a training lab we stood up and maybe you could have some advice/clarification to offer me from working on this. We have a locally hosted external DNS which wildcards everything not otherwise specified to an authenticating web proxy (currently caddy and locally hosted coredns). It's not clear what the "lazy" way to get a wildcard DNS cert via ACME DNS challenge going is with this kind of set up. To me it feels like Caddy is missing a built in functionality to act as the delegated ACME DNS responder and it's not clear which option is the best way to get Caddy (normally very automatic) to reload after it handles the requests. Not particularly bound to Caddy or Coredns on the external side but it's what we're using for the internal as well.