How to install Docker on Ubuntu 18.04 and Build specific image by Dockerfile

Docker Installation
$ sudo apt install -y apt-transport-https ca-certificates curl gnupg-agent software-properties-common

$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

$ sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"

$ sudo apt update
$ sudo apt install -y docker-ce docker-ce-cli containerd.io

Check Docker version and status
$ docker -v
$ docker info