I didn't see anything mentioned on the github issues for this issue, but I'm following the quick install instructions using docker setting up netmaker on debian bookworm. I getting an error on startup:

[netmaker] Fatal: Unable to initialize iptables on host: lookup coredns on 10.89.0.1:53: read udp 10.89.0.7:34006->10.89.0.1:53: i/o timeout

Looking at the coredns container logs it's saying

loading Caddyfile via flag: open /root/dnsconfig/Corefile: no such file or directory

and then dying.