install_docker.sh

# source https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-debian-9
sudo apt update
# let apt use package over https
sudo apt install apt-transport-https ca-certificates curl gnupg2 software-properties-common
# add docker gpg key
curl -fsSL https://download.docker.com/linux/debian/gpg | sudo apt-key add -
# add docker repository to apt
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/debian $(lsb_release -cs) stable"
sudo apt update

# enable docker repo 
apt-cache policy docker-ce
# install docker
sudo apt install docker-ce