install docker on debian 9 stretch

install-docker-debain-9.sh

remove old version 
#apt-get remove docker docker-engine

install all preRequisite packages

#apt install apt-transport-https \
    ca-certificates software-properties-common \
    curl apt-transport-https
    
    
add docker repo 
#sudo add-apt-repository \
"deb [arch=amd64] 
https://download.docker.com/linux/debian \
$(lsb_release -cs) stable"

update repo 
#apt update

install docker
#apt install docker-ce

testing 
#docker -v 
#docker run hello-world