I am doing some research to determine whether and how I can set up a website that will allow visitors with user accounts to create, edit and share documents using a custom document format. The documents will contain text data (e.g. JSON and/or XML) and pointers to various types of binary media files. I would like to put the text and binary documents under version control as well, so I can eventually develop a front-end that will allow users to view or compare older document versions. What kind of options would make sense to store these documents?