We need to improve security on the access to The collaboration server
We can use the same pattern as for media files leveraging the nginx
subrequest feature.
We want to use the same pattern for the websocket collaboration service
authorization as what we use for media files.
This addition comes in the next commit but doing it efficiently
required factorizing some code with the media auth view.
In development mode with docker-compose, we need to
configure Nginx to proxy requests to the Minio server.
Before to proxy to Minio, we need to
authenticate the request, so we proxy to the
Django server first to fill the request with the
necessary headers, then we proxy to Minio.
