Definitely would appreciate updates to our documentation so you can help others facing similar problems! Glad you're on your way.

I'm looking to use Azure CosmosDB mongoDB API with more than 10GB, so I need a shard key to get unlimited storage. Is there anything I have to do with NodeBB for the shard key? Also, I couldn't find this anywhere and have no forum experience, but excluding media, how much storage does a moderate forum take up?