docker-traefik/tasks/docker.yml

- name: Install apt-transport-https
  apt:
    name: apt-transport-https
    state: present

- name: Add an Apt signing key, uses whichever key is at the URL
  ansible.builtin.apt_key:
    url: https://download.docker.com/linux/debian/gpg 
    state: present
    keyring: /usr/share/keyrings/docker-archive-keyring.gpg

- name: Add specified repository into sources list
  ansible.builtin.apt_repository:
    repo: "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/debian buster stable"
    state: present

- name: Update repositories cache and install "docker-ce" package
  apt:
    name: docker-ce
    update_cache: yes

- name: Update repositories cache and install "docker-ce-cli" package
  apt:
    name: docker-ce-cli
    update_cache: no

- name: Update repositories cache and install "containerd.io" package
  apt:
    name: containerd.io
    update_cache: no