Add metrics-nekomesh host

config/hosts/metrics-nekomesh/prometheus.nix

@@ -0,0 +1,16 @@
+{ ... }:
+{
+  services.prometheus = {
+    enable = true;
+    retentionTime = "2y";
+    scrapeConfigs = [
+      {
+        job_name = "meshcore";
+        scrape_interval = "15m";
+        static_configs = [{
+          targets = [ "localhost:9091" ];
+        }];
+      }
+    ];
+  };
+}