Add grafana to library

hosts/library/default.nix

@@ -42,6 +42,13 @@
     enable = true;
   };
 
+  services.grafana = {
+    enable = true;
+    domain = "library.mesh.vimium.net";
+    port = 3000;
+    addr = "127.0.0.1";
+  };
+
   services.prometheus = {
     enable = true;
     port = 9001;
@@ -58,7 +65,7 @@
     };
     scrapeConfigs = [
       {
-        job_name = "library";
+        job_name = "node";
         static_configs = [{
           targets = [
             "127.0.0.1:${toString config.services.prometheus.exporters.node.port}"