This is actually authored by Julian Foad here (https://lab.trax.im/matrix/matrix-docker-ansible-deploy), but was in need of a rebase and various adjustments caused by huge playbook refactoring that landed in the past months. This rework is completely untested. Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/266
main.yml is not included due to that its changed separately.