How to configure Docker to use external DNS server

gistfile1.txt

Either via 
$ docker run --dns 10.0.0.2 busybox nslookup google.com

or edit your /etc/docker/daemon.json to have something like:

{
    "dns": ["10.0.0.2", "8.8.8.8"]
}

then restart docker service  
$ sudo systemctl docker restart