If search request returns empty array from tmdb, then send a 404 reponse with error message back to client.

src/webserver/controllers/tmdb/searchMedia.js

@@ -14,6 +14,11 @@ function searchMoviesController(req, res) {
   Promise.resolve()
   .then(() => tmdb.search(query, page, type))
   .then((movies) => {
+  	if (movies.length > 0) {
+  		res.send(movies);
+  	} else {
+  		res.status(404).send({ success: false, error: 'Search query did not return any results.'})
+  	}
     res.send(movies);
   })
   .catch((error) => {