I am interested in the following. Please tell me, is it possible to configure Firebase in such a way that it automatically uploads documents to Minio. Or is this something that needs to be handled at the code level?
I tried to google this information, but couldn't find anything.
There isn't a simple configuration that you can enable for this.
When you say "documents" I assume you're talking about Firestore documents. You can certainly write your own code to implement this, perhaps using Cloud Functions Firestore triggers to know when a document changes, then take action on that.
Or if you're talking about objects in Cloud Storage, you can use Cloud Storage triggers as well.