Send correct content-type.

web/web.go

@@ -21,6 +21,7 @@ func handleReadStatus(statusFunc func() spaceapi.SpaceStatus) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		status := statusFunc()
 
+		w.Header().Set("Content-Type", "application/json; charset=utf-8")
 		if err := json.NewEncoder(w).Encode(status); err != nil {
 			http.Error(w, fmt.Sprintf("Error encoding JSON: %s", err), http.StatusInternalServerError)
 		}