DNS service not running on Raspberry Pi 4B

[yubiuser]

@InstantDreams

The use of DNSMASQ_USER fixes this problem but a further question remains - is this to be the expected approach in future and if so, should the docker documentation be updated to reflect this?

We are working on a fix already, see this comment:
https://github.com/pi-hole/docker-pi-hole/issues/734#issuecomment-1005394799