rageshake: Add file server with basic auth
rageshake: Add file server with basic auth

Set via environment variables on startup.

vector-im/riot-web,vector-im/riot-web,vector-im/vector-web,vector-im/vector-web,martindale/vector,vector-im/riot-web,vector-im/vector-web,vector-im/riot-web,vector-im/riot-web,vector-im/vector-web,martindale/vector,vector-im/riot-web,vector-im/vector-web