Merge branch 'lash/extension-api-2' into 'master'

WIP extension APIs per 20200810

See merge request grassrootseconomics/cic-docs!10

spec/014_notification_api_extension.md

@@ -0,0 +1,41 @@
+# API EXTENSIONS FOR VIEWING NOTIFICATION DATABASE
+
+
+## NOMENCLATURE
+
+Values enclosed with `<>` are _required_.
+
+Values enclosed with `[]` means _optional_.
+
+No enclosure means _literal_.
+
+## ADDED METHODS
+
+Endpoints _added_ are found under /api/ext/
+
+### `/api/ext/sms/` `/api/ext/sms/user/<user_id>/` `/api/ext/sms/<phone_number>/`
+
+#### **GET**
+
+Returns a list of latest sms notifications sent by the platform.
+
+If `user_id` or `phone_number` is given, only entries for the affected user will be returned.
+
+Accepts one query string:
+
+```
+	limit: [uint] - maximum items to return (default: 100)
+```
+
+Response payload:
+
+```
+[
+	{
+		datetime: <string>,
+		number: <string>,
+		message: <string>,	
+	},
+	...
+]
+```