docker installation instructions

docker.sh

#!/usr/bin/env bash

# more details:
# https://docs.docker.com/install/linux/docker-ce/ubuntu/

sudo apt update

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

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

# 9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88
sudo apt-key fingerprint 0EBFCD88

sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"

sudo apt update

sudo apt --yes install docker-ce

# https://docs.docker.com/engine/security/security/#docker-daemon-attack-surface
sudo usermod --append --groups docker $USER