---
- name: install docker dependencies
  apt:
    state: present
    name:
      - apt-transport-https
      - ca-certificates
      - curl
      - gnupg-agent
      - software-properties-common

- name: add docker apt key
  apt_key:
    url: https://download.docker.com/linux/debian/gpg
    state: present
    id: 9DC858229FC7DD38854AE2D88D81803C0EBFCD88

- name: add docker repo
  apt_repository:
    repo: deb [arch=amd64] https://download.docker.com/linux/debian buster stable
    state: present
    mode: 0600

- name: install docker-ce
  apt:
    state: present
    name:
      - docker-ce
      - docker-ce-cli
      - containerd.io
...