관리자/업데이트 화면이 비어 있습니다. SSH 콘솔로 도커를 수동으로 업데이트하는 방법은?

There’s a good chance your OS is out of date and that you should move to a fresh new VM. Does cat /etc/issue suggest that you have 18.04?

You can try

apt update;apt install docker-ce

Another way, that prints a scary message, but is probably safe if you installed docker with apt

wget -qO- https://get.docker.com/ | sh