tuleap-aio demo docker image is still running centos6, it should now use centos7 (ok ok and 8 but it's not yet released so...)
As it's a nightmare to get systemd working inside a container, everything that is related to it should be replaced by something else:
- process supervision => supervisord ✓
- timers => cron ✓
- apache => need to abstract the way deamon is reloaded (centos6, centos7-systemd, centos7-docker)