docs: document notification provider config

README.md

@@ -52,4 +52,10 @@ url: <your-providers-URL>
 
 Examples for providers are:
 - https://ifconfig.me
-- https://api.ipify.org
+- https://api.ipify.org
+
+## Notification Providers
+The notification provider is used to send notifications whena IP address changes and a DNS record is updated.
+
+### Console
+The console notification provider is used to print the notification to the console. This is the default notification provider.