Add remoting options to server/config.json

/to @bajtos @ritch 

See https://github.com/strongloop/loopback/issues/608
See https://github.com/strongloop/loopback/pull/337
See [lib/middleware/rest.js#L27](https://github.com/strongloop/loopback/blob/97a8c3acb2845e2e7495a67605528527d37390a0/lib/middleware/rest.js#L27), it is already accessing the app.