Hey there,
maybe this is another piece of software that would fit into the DietPi concept.
https://github.com/mozilla-services/syncserver
The Firefox Sync Server is the self-hosted equivalent of e.g. the Bookmark-Server of Mozilla.
This is an all-in-one package for running a self-hosted Firefox Sync server. It bundles the "tokenserver" project for authentication and the "syncstorage" project for storage, produce a single stand-alone webapp.
I’d like to host all my data by myself. Perhaps this is another option for DietPi 
CU, mike175de