dokku-ansible-deploy/plays/lib/debug.yml

---
- name: Debug all Ansible variables
  debug:
    msg: |
      Module Variables ("vars"):
      --------------------------------
      {{ vars }}

      Environment Variables ("environment"):
      --------------------------------
      {{ environment }}

      GROUP NAMES Variables ("group_names"):
      --------------------------------
      {{ group_names }}

      GROUPS Variables ("groups"):
      --------------------------------
      {{ groups }}

      HOST Variables ("hostvars"):
      --------------------------------
      {{ hostvars }}
  when: debug