Imports github.com/coredns/caddy github.com/coredns/coredns/core/dnsserver github.com/coredns/coredns/plugin github.com/coredns/coredns/request github.com/fsouza/go-dockerclient github.com/miekg/dns go.etcd.io/etcd/client/v3 Standard library imports context crypto/tls errors fmt log net strings