Add more Backbone services

services/backbone/fts.md

 ---
-title: File Transfer Service
+title: <i class="fas fa-external-link-alt"></i> File Transfer Service
 title_image: globe.jpeg
 layout: services/default
 author: none
@@ -7,4 +7,5 @@ additional_css:
     - title/service-title-buttons.css
 excerpt:
   "An FTS based file transfer service connecting Helmholtz research."
+redirect_to: https://hifis.net/doc/core-services/fts-endpoint/
 ---

services/backbone/helmholtzbackbone.md

+---
+title: Helmholtz Backbone (VPN)
+title_image: pexels-brett-sayles-2881232.jpg
+layout: services/default
+author: none
+additional_css:
+    - title/service-title-buttons.css
+excerpt:
+  "An FTS based file transfer service connecting Helmholtz research."
+redirect_to: news/2020/09/01/VPN.html
+---