This package installs Docker and docker-compose and use it to run the container quay.io/egroupware/collabora-key:stable.
It also uses v2tec/watchtower (https://github.com/v2tec/watchtower) to automatic use new versions of its containers everyday at 4am, if a new version is available.
Support-key can be entered from EGroupware Collabora app into /var/lib/egroupware/default/loolwsd/loolwsd.xml, which is used as volum for collabora-key container.