Hi,
please consider adding tine groupware to Cloudron 
tine is an open source groupware and application framework
technology: php / javascript / mysql / mariadb / redis / ...
The correct repo is now https://github.com/tine-groupware/tine
Their primary website (in German) is: https://www.tine-groupware.de/
https://hub.docker.com/r/tinegroupware/tine
