Add raccoon node monitoring

m/hut/monitoring.nix

@@ -250,6 +250,14 @@
           module = [ "raccoon" ];
         };
       }
+      {
+        job_name = "raccoon";
+        static_configs = [{
+          targets = [
+            "127.0.0.1:19002" # Node exporter (remote)
+          ];
+        }];
+      }
       {
         job_name = "ipmi-fox";
         metrics_path = "/ipmi";