Kubernetes: lookup registry-1.docker.io on 17.15.20.19:53: no such host

Problem:
Error response from daemon: Get https://registry-1.docker.io/v2/: dial tcp: lookup registry-1.docker.io on 17.15.20.19:53: no such host

Reason:
Docker running behind proxy

Solution:
https://docs.docker.com/config/daemon/systemd/

# cat /etc/systemd/system/docker.service.d/http-proxy.conf
[Service]
Environment="HTTP_PROXY=http://proxy.goweekend.ca:3288/"
Environment="HTTPS_PROXY=http://proxy.goweekend.ca:3288/"