Installation of Docker

More infor here. Requirements are met since we are running debian10.

Uninstall potentially conflicting version of docker:

sudo apt-get remove docker docker-engine docker.io containerd runc

Prepare to update repositories:

sudo apt-get update

In my case, errors of the type

Repository 'http://deb.debian.org/debian buster InRelease' changed its 'Version' value from '10.10' to '10.11'

cropped up, and apparently the cure is to allow release info change:

sudo apt-get --allow-releaseinfo-change update

I also had to remove/comment out an old docker release source in /etc/apt.d/sources.list for sudo apt-get update to return no error or warnings.

Install dependencies:

sudo apt-get install apt-transport-https ca-certificates curl gnupg lsb-release

(all were already satisfied)

Add docker repository (debian!)

curl -fsSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/debian $(lsb_release -cs) stable" | sudo tee /etc/apt
/sources.list.d/docker.list > /dev/null

Neat. The docker repository is in an aptly named file docker.list under /etc/apt/sources.list.d

sudo apt-get update
sudo apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin

Check that it is running:

sudo docker run hello-world

Success.