Fix error pinging docker registry (no such host)

• 1 Add registry IP and FQDN to your hosts file
  
• 2 Maybe there is a port number missing in /etc/containers/registries.conf
  [registries.insecure]
  registries = ['private-registry.there:5000']
  
• N podman login private-registry.there:5000
  

References

• https://github.com/docker/for-win/issues/4884
• https://www.digitalocean.com/community/tutorials/how-to-set-up-a-private-docker-registry-on-ubuntu-18-04