geerlingguy-ansible-for-devops/docker-flask/provisioning/main.yml

---
- hosts: all
  become: true

  vars:
    build_root: /vagrant/provisioning

  pre_tasks:
    - name: Update apt cache if needed.
      apt: update_cache=yes cache_valid_time=3600

  roles:
    - role: geerlingguy.docker

  tasks:
    - import_tasks: setup.yml
    - import_tasks: docker.yml