add edit on

docs/config.json

@@ -8,6 +8,10 @@
         "auto_landing": false,
         "date_modified": true,
         "jump_buttons": true,
+        "edit_on": {
+            "name": "Gitlab",
+            "basepath": "https://git-repo.iml.unibe.ch/iml-open-source/ldap-php-class/tree/master/docs"
+        },
         "links": {
             "Repo": "https://git-repo.iml.unibe.ch/iml-open-source/ldap-php-class/",
             "IML Opensource": "https://os-docs.iml.unibe.ch/"