[Docker]
$ sudo docker-compose up --build -d
Pulling jenkins (jenkins/jenkins:lts)...
ERROR: Get "https://registry-1.docker.io/v2/": dial tcp: lookup registry-1.docker.io on [::1]:53: read udp [::1]:36828->[::1]:53: read: connection refused
1. re install
https://docs.docker.com/engine/install/ubuntu/
2.
https://lemontia.tistory.com/814