format grafana ntfy alerts

hosts/AZ-PRM-1/services/monitoring/alerting.nix

@@ -245,6 +245,31 @@ in {
               settings = {
                 url = "$GRAFANA_NTFY_WEBHOOK_URL";
                 httpMethod = "POST";
+                title = ''
+                  {{ if eq .Status "resolved" }}RESOLVED{{ else }}FIRING{{ end }}: {{ index .CommonLabels "alertname" }}{{ with index .CommonLabels "target" }} {{ . }}{{ else }}{{ with index .CommonLabels "flow_id" }} {{ . }}{{ else }}{{ with index .CommonLabels "instance" }} {{ . }}{{ end }}{{ end }}{{ end }}
+                '';
+                message = ''
+                  {{ range .Alerts -}}
+                  {{ $labels := .Labels -}}
+                  {{ if eq .Status "resolved" }}✅ Resolved{{ else }}🚨 Firing{{ end }}: {{ index $labels "alertname" }}
+                  {{ with index $labels "target" }}Target: {{ . }}
+                  {{ end -}}
+                  {{ with index $labels "flow_id" }}Flow: {{ with index $labels "namespace_id" }}{{ . }}/{{ end }}{{ . }}
+                  {{ end -}}
+                  {{ with index $labels "instance" }}Instance: {{ . }}
+                  {{ end -}}
+                  {{ with index $labels "severity" }}Severity: {{ . }}
+                  {{ end -}}
+                  {{ with index .Annotations "description" }}Details: {{ . }}
+                  {{ end -}}
+                  {{ with .GeneratorURL }}Source: {{ . }}
+                  {{ end }}
+                  {{ end -}}
+                '';
+                headers = {
+                  Template = "grafana";
+                  Markdown = "yes";
+                };
               };
             }
           ];