DNS server that only serves CNAME records. Unknown queries are delegated to a fallback DNS server.
cname-serve was made to be used alongside Tailscale Split DNS. For example, if
you have ha.d14.place, you can use cname-serve to serve a CNAME record
pointing to an internal Tailscale hostname only when you are inside the Tailnet
itself, otherwise delegating to public DNS records.
See config.example.toml for an example configuration.
Run it as cname-serve -c config.toml.