도커설치ubuntu@ddogan:~$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -ubuntu@ddogan:~$ sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"ubuntu@ddogan:~$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpgubuntu@ddogan:~$ sudo apt update..