Add bird to monitoring

hosts/monitoring-3/configuration.nix

@@ -23,6 +23,12 @@ let
     "${host.config.networking.hostName}.mon.clerie.de:9100")
     monitoringHosts;
 
+  birdMonitoringTargets = mapAttrsToList (name: host:
+    "${host.config.networking.hostName}.mon.clerie.de:9324")
+    (filterAttrs (name: host:
+    attrByPath ["clerie" "monitoring" "bird"] false host.config)
+    monitoringHosts);
+
 in {
   imports =
     [
@@ -137,6 +143,15 @@ in {
           }
         ];
       }
+      {
+        job_name = "bird-exporter";
+        scrape_interval = "20s";
+        static_configs = [
+          {
+            targets = birdMonitoringTargets;
+          }
+        ];
+      }
       {
         job_name = "zimmer-temp";
         scrape_interval = "20s";