coredns/README.md

CoreDNS Deployment

Configuration:
$CDNS_DATA/config should contain one file named Corefile, which stores CoreDNS configuration.
$CDNS_DATA/zones can contain the db.* zone files.
$CDNS_REPO in the environment file can point towards a custom built CoreDNS repo, for example for compiling in other plugins. Do not touch if unsure.