add traefik to menu

public/API/mainMenu.json

@@ -97,6 +97,11 @@
                 "name": "Mailcow E-Mail Server",
                 "url": "/anleitungen/mailcow.html",
                 "type": "link"
+            },
+            {
+                "name": "Traefik 2 Reverse Proxy",
+                "url": "/anleitungen/traefik.html",
+                "type": "link"
             }
         ]
     },