Is it possible that to reveal Jolla smartphone as a media server?

I wanted to send my music files on my Marantz AV receiver. Only the Android Marantz program does not have the function. However, I can make search a Media Server.
The Sailfish program "upnpplayer" cant also send out any files from the smartphone.
Therefore, I am looking for a way to reveal the smartphone itself as a media server.