fix(gatus): Add Grafana IRM Alerting

values/gatus/values/values.yaml

@@ -22,6 +22,28 @@ config:
     header: Oceanbox Service Status
     logo: https://maps.oceanbox.io/ob.png
     link: https://maps.oceanbox.io
+    default-sort-by: "group"
+
+  alerting:
+    custom:
+      url: "https://oncall-prod-eu-west-0.grafana.net/oncall/integrations/v1/formatted_webhook/WmWq7fQWMJtv1Xty1V4jJHqRV/"
+      method: "POST"
+      body: |
+        {
+          "title":     "[ENDPOINT_GROUP] ➔ [ENDPOINT_NAME]",
+          "message":   "[ALERT_TRIGGERED_OR_RESOLVED]: [ENDPOINT_GROUP] ➔ [ENDPOINT_NAME] ➔ [ALERT_DESCRIPTION]",
+          "state":     "[ALERT_TRIGGERED_OR_RESOLVED]",
+          "image_url": ""
+        }
+      headers:
+        Content-Type: "application/json"
+      send-on-resolved: true
+      failure-threshold: 3
+      success-threshold: 2
+      placeholders:
+        ALERT_TRIGGERED_OR_RESOLVED:
+          TRIGGERED: "alerting"
+          RESOLVED: "ok"
 
   .defaults: &defaults
     interval: 30s