offers/network-dns-cache repository overview

https://github.com/offers/network-dns-cache⁠

Just start it with port 53/UDP forwarded, point your clients' resolv.conf at it, and voila!

Example: docker run -p 53:53/udp offers/network-dns-cache:

Allows only clients on a private subnet (i.e. 10., 172.{16-31}, 192.168.) to connect.