Add docker installation role

roles/docker/tasks/Ubuntu.yml

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+- name: Ensure requirements installed
+  ansible.builtin.package:
+    name: "{{ requisites }}"
+    state: present
+    update_cache: yes
+  tags:
+    - apt
+    - download
+    - packages
+  become: true
+
+- name: Ensure docker GPG apt key exists
+  apt_key:
+    url: https://download.docker.com/linux/ubuntu/gpg
+    state: present
+  tags:
+    - apt
+    - repository
+  become: true
+
+- name: Ensure docker repository exists
+  apt_repository:
+    repo: deb https://download.docker.com/linux/ubuntu focal stable
+    state: present
+  tags:
+    - apt
+    - repository
+  become: true
+
+- name: Ensure latest docker-ce installed
+  ansible.builtin.package:
+    name: "{{ packages }}"
+    state: latest
+  tags:
+    - apt
+    - download
+    - packages
+  become: true
+
+- name: Ensure docker module for python installed
+  pip:
+    name: docker
+  tags:
+    - pip
+    - python
+    - packages
+  become: true

roles/docker/tasks/main.yml

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+---
+# Bring docker on the system and up to date
+
+- name: "Select tasks for {{ ansible_distribution }} {{ ansible_distribution_major_version }}"
+  include_tasks: "{{ distribution }}"
+  with_first_found:
+    - "{{ ansible_distribution }}-{{ ansible_distribution_major_version }}.yml"
+    - "{{ ansible_distribution }}.yml"
+    - "{{ ansible_os_family }}.yml"
+  loop_control:
+    loop_var: distribution

roles/docker/vars/main.yml

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+requisites:
+  - apt-transport-https
+  - ca-certificates
+  - curl
+  - software-properties-common
+  - python3-pip
+  - python3-setuptools
+  - virtualenv
+
+packages:
+  - docker-ce