modify doc template

Author: Mia-Cross

templates/resources/instance_image.md.tmpl

@@ -101,27 +101,27 @@ In addition to all arguments above, the following attributes are exported:
 - `from_server_id` - ID of the server the image is based on (in case it is a backup).
 - `state` - State of the image. Possible values are: `available`, `creating` or `error`.
 - `organization_id` - The organization ID the image is associated with.
+- `root_volume` - The description of the root volume attached to the image.
+
+  -> The `root_volume` block contains :
+    - `id` - The ID of the volume.
+    - `name` - The name of the volume.
+    - `size` - The size of the volume.
+    - `volume_type` - The type of volume, possible values are `l_ssd` and `sbs_snapshot`.
+
 - `additional_volumes` - The description of the extra volumes attached to the image.
 
     -> The `additional_volumes` block contains :
     - `id` - The ID of the volume.
     - `name` - The name of the volume.
-    - `export_uri` - The export URI of the volume.
     - `size` - The size of the volume.
-    - `volume_type` - The type of volume, possible values are `l_ssd` and `b_ssd`.
-    - `creation_date` - Date of the volume creation.
-    - `modification_date` - Date of volume latest update.
-    - `organization` - The organization ID the volume is associated with.
-    - `project` - ID of the project the volume is associated with
+    - `volume_type` - The type of volume, possible values are `l_ssd` and `sbs_snapshot`.
     - `tags` - List of tags associated with the volume.
-    - `state` - State of the volume.
-    - `zone` - The [zone](../guides/regions_and_zones.md#zones) in which the volume is.
-
-- `server` - Description of the server containing the volume (in case the image is a backup from a server).
+    - `server` - Description of the server containing the volume (in case the image is a backup from a server).
 
-    -> The `server` block contains :
-    - `id` - ID of the server containing the volume.
-    - `name` - Name of the server containing the volume.
+        -> The `server` block contains :
+        - `id` - ID of the server containing the volume.
+        - `name` - Name of the server containing the volume.
 
 ## Import