docs: document gotify notification provider config

README.md

@@ -23,6 +23,12 @@ dns_provider:
   config:
     api_key: <your-api-key>
     base_url: https://api.hosting.ionos.com/dns
+notification_provider:
+  type: gotify
+  config:
+    url: <your-gotify-host>
+    token: <your-token>
+    priority: 0
 domains:
   - tld: example.com
     subdomains:
@@ -59,3 +65,14 @@ The notification provider is used to send notifications whena IP address changes
 
 ### Console
 The console notification provider is used to print the notification to the console. This is the default notification provider.
+
+### Gotify
+The Gotify notification provider is used to send notifications to a Gotify server.
+
+```yaml
+url: <your-gotify-host>
+token: <your-token>
+priority: 0
+```
+
+The priority must be between 0 and 4.