Following steps:-

1. INSTALL DOCKER ENGINE add user to docker group for using docker command without sudo

!/bin/sh

set -e

Install Dependencies,

sudo apt install -y curl apt-transport-https \
software-properties-common ca-certificates

1. #Install Docker :- curl -fsSL https://yum.dockerproject.org/gpg | sudo apt-key add- echo "deb https://apt.dockerproject.org/repo/debian-stretch testing" | \

sudo tee /etc/apt/sources.list.d/docker-engine.list
sudo apt-get update -y
sudo apt-get install -y docker-engine

1. #Run Docker

sudo systemctl start docker
sudo systemctl enable docker

4 #Adding user to docker for using Docker without sudo command .

sudo gpasswd -a "${user}" docker

1. #Reboot sudo reboot

** Execution Result **
$ docker run hello-world

Hello from Docker !