Introduce DockerFor Overview Docker, please klik Link Create 2 Instance with hostname using vagrant link :vm1.roomit.tech 192.168.33.11vm2.roomit.tech 192.168.33.12Change Hostname in vm1hostnamectl set-hostname vm1.roomit.tech Change Hostname in vm2hostnamectl set-hostname vm2.roomit.tech or visit LinkUsing Ubuntu BionicLogin to VM Via ssh, open 2 terminalin Both Server and please do it : Install Dockersudo apt update sudo apt -y install docker.io sudo systemctl status docker if not running s...