OwnCloud decided to develop a completely new product a few months ago. In the meantime, there are already the first beta versions of the new OwnCloud with the name oCIS. oCIS stands for ownCloud Infinite Scale and should make clear that this cloud solution should be very scalable.
Newly, it is sufficient to start a single container with oCIS, which already contains all the necessary dependencies. So no database and no further containers are necessary to self-host oCIS.

a quick guide on setting up ownCloud infinite scale using docker compose with additional services like Apache Taki for better full search and Libreoffice.