Install Docker CE on Ubuntu using Ansible

docker.yml

---
- hosts: all
  tasks:
  - name: Install prerequisites
    apt:
      name: ['apt-transport-https','ca-certificates','curl','gnupg2','software-properties-common']
      update_cache: yes

  - name: Add Docker GPG key
    apt_key: url=https://download.docker.com/linux/ubuntu/gpg

  - name: Add Docker APT repository
    apt_repository:
      repo: deb [arch=amd64] https://download.docker.com/linux/{{ansible_distribution|lower}} {{ansible_distribution_release}} stable

  - name: Install Docker
    apt:
      name: docker-ce
      update_cache: yes

Reference:
https://www.digitalocean.com/community/tutorials/how-to-use-ansible-to-install-and-set-up-docker-on-ubuntu-18-04