I have cloned and updated the linuxservio.io beta ownCloud docker.  I have been using it for over a year and it works very well.  I know that NextCloud is the in thing, but I am committed to ownCloud in my business and have over 200GB of media, calendars, contacts, and tasks on ownCloud.  I do not want to invest time and take the risk trying to move to NextCloud.  The thing I really like about this docker is that mariadb is installed in the docker so a separate docker for the database is not req