This implementation is basically a Rados Gateway reverse proxy. It
additionally takes care of the authentication to the Rados Gateway, but to use
it you will have to be authenticated against the dashboards RESTful API.
The corresponding credentials can be configured using the following commands:
dashboard set-rgw-api-secret-key <secret-key>
dashboard set-rgw-api-access-key <access-key>
Signed-off-by: Patrick Nawracay <pnawracay@suse.com>