Install Docker Engine on Ubuntu

install_docker.sh

# ref: https://docs.docker.com/engine/install/ubuntu/#install-using-the-repository

setup_apt_repo() {
  # Add Docker's official GPG key:
  sudo apt-get update
  sudo apt-get install ca-certificates curl gnupg
  sudo install -m 0755 -d /etc/apt/keyrings
  curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
  sudo chmod a+r /etc/apt/keyrings/docker.gpg

  # Add the repository to Apt sources:
  echo \
    "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
    "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \
    sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
  sudo apt-get update
}

install_docker_packages() {
  sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
}

test_docker_version() {
  docker --version
}

setup_apt_repo
install_docker_packages
test_docker_version