Install Docker on an instance of Ubuntu 18.04

install-docker-u1804.sh

#!/bin/bash
# Commands taken from https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-18-04
sudo apt update
sudo apt install -y apt-transport-https ca-certificates curl software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu bionic stable"
sudo apt update
sudo apt install -y docker-ce
systemctl start docker