Fix index

mkdocs.yml

 site_name: "storage"
 
 nav:
-  - Object Storage Guides: object-storage/object-storage-index.md
-    - S3 Service: object-storage/s3-service.md
-    - RBD Service: object-storage/rbd-service.md
-  - Object Storage Guides: object-storage.md
+  - Object Storage Guides: ./object-storage/object-storage-index.md
+    - S3 Service: ./object-storage/s3-service.md
+    - RBD Service: ./object-storage/rbd-service.md
+  - Object Storage Guides: ./object-storage.md

object-storage/object-storage-index.md

@@ -27,13 +27,7 @@ Object Storage Services is a portfolio of services allowing to facilitate your a
 
     Do you need to cooperate with your colleagues, edit documents and share data?
 
-    [:octicons-arrow-right-24: Owncloud](https://du.cesnet.cz/en/navody/owncloud/start)   
-    [:octicons-arrow-right-24: Onlyoffice](https://du.cesnet.cz/en/navody/onlyoffice/start)   
-
-<!---    
-[:octicons-arrow-right-24: Account properties and lifecycle](/account/properties)   
---->
-
-
+    [:octicons-arrow-right-24: Owncloud](https://du.cesnet.cz/en/navody/owncloud/start)  
+ 
 </div>