add grafana to cloudflared

Author: NathanFouere

modules/system/server/vm/k3s-modules/server/cloudflared.nix

@@ -25,6 +25,7 @@
             "nathan-fouere.com" = "http://localhost:30000";
             "bazarr.nathan-fouere.com" = "http://localhost:30000";
             "grafana.nathan-fouere.com" = "http://localhost:30000";
+            "prometheus.nathan-fouere.com" = "http://localhost:30000";
           };
         };
       };