[#467] include service configuration documentation

docs/installation/config_cli.rst

@@ -58,20 +58,38 @@ Create or update a (single) YAML configuration file with your settings:
 
 .. code-block:: yaml
    ...
+   zgw_consumers_config_enable: true
+   zgw_consumers:
+   services:
+     - identifier: objecttypen-foo
+       label: Objecttypen API Foo
+       api_root: http://objecttypen.foo/api/v1/
+       api_type: orc
+       auth_type: api_key
+     - identifier: objecttypen-bar
+       label: Objecttypen API Bar
+       api_root: http://objecttypen.bar/api/v1/
+       api_type: orc
+       auth_type: api_key
+
    objecttypes_config_enable: true
    objecttypes:
      items:
        - uuid: b427ef84-189d-43aa-9efd-7bb2c459e281
          name: Object Type 1
-         service_identifier: service-1
+         service_identifier: objecttypen-foo
 
        - uuid: b0e8553f-8b1a-4d55-ab90-6d02f1bcf2c2
          name: Object Type 2
-         service_identifier: service-2
+         service_identifier: objecttypen-bar
    ...
 
 .. note:: The ``uuid`` field will be used to lookup existing ``ObjectType``'s.
 
+Objecttypes require a corresponding ``Service`` to work correctly. Creating
+these ``Service``'s can be done by defining these in the same yaml file. ``Service``
+instances will be created before the ``ObjectType``'s are created.
+
 
 Execution
 =========