📝 Add docs for NotificationConfigurationStep

docs/index.rst

@@ -23,6 +23,7 @@ Features
    :caption: Contents:
 
    quickstart
+   setup_config
 
 
 Indices and tables

docs/setup_config.rst

@@ -0,0 +1,40 @@
+Setup configuration
+===================
+
+Loading notification configuration from a YAML file
+***************************************************
+
+This library provides a ``ConfigurationStep``
+(from the library ``django-setup-configuration``, see the
+`documentation <https://github.com/maykinmedia/django-setup-configuration>`_
+for more information on how to run ``setup_configuration``)
+to configure the notification configuration.
+
+To add this step to your configuration steps, add ``django_setup_configuration`` to ``INSTALLED_APPS`` and add the following setting:
+
+    .. code:: python
+
+        SETUP_CONFIGURATION_STEPS = [
+            ...
+            "notifications_api_common.contrib.setup_configuration.steps.NotificationConfigurationStep"
+            ...
+        ]
+
+The YAML file that is passed to ``setup_configuration`` must set the
+``notifications_config_enable`` flag to ``true`` to enable the step. All fields under ``notifications_config`` are optional.
+
+Example file:
+
+    .. code:: yaml
+
+        notifications_config_enable: True
+        notifications_config:
+          notifications_api_service_identifier: notifs-api
+          notification_delivery_max_retries: 1
+          notification_delivery_retry_backoff: 2
+          notification_delivery_retry_backoff_max: 3
+
+If the ``notifications_api_service_identifier`` is specified, it might also be useful
+to use the `ServiceConfigurationStep <https://zgw-consumers.readthedocs.io/en/latest/setup_config.html>`_
+from ``zgw-consumers``.
+