What I (and believe many others) really want is a self-hosted Zotero server. See question has been asked:

https://forums.zotero.org/discussion/73721/zotero-self-hoste...

https://www.reddit.com/r/zotero/comments/d270kv/zotero_datas...

https://github.com/zotero/dataserver/issues/105

https://softwarerecs.stackexchange.com/questions/48335/foss-...

https://groups.google.com/g/zotero-dev/c/9FdSz0kIG_4?pli=1

Unfortunately, there is no officially supported way to do this. The official dataserver package does not have an instruction: https://github.com/zotero/dataserver

There is an unofficial package from 5 years ago https://hub.docker.com/r/facciolo/zotero_dataserver-docker