Install docker on debian
First, update your existing list of packages:
sudo apt update
Next, install a few prerequisite packages which let apt use packages over HTTPS:
sudo apt install apt-transport-https ca-certificates curl gnupg2 software-properties-common
Then add the GPG key for the official Docker repository to your system:
curl -fsSL https://download.docker.com/linux/debian/gpg | sudo apt-key add -
Add the Docker repository to APT sources:
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/debian $(lsb_release -cs) stable"
Next, update the package database with the Docker packages from the newly added repo:
sudo apt update
#Make sure you are about to install from the Docker repo instead of the default Debian repo:
apt-cache policy docker-ce