feat(tanzanite): init grafana and prometheus

hosts/tanzanite/default.nix

@@ -76,6 +76,47 @@ in {
           proxyPass = "http://127.0.0.1:8009";
         };
       };
+      "grafana.stitchy.moe" = {
+        enableACME = true;
+        forceSSL = true;
+        locations."/" = {
+          proxyPass = "http://127.0.0.1:3000";
+        };
+        extraConfig = ''
+          allow 10.100.0.0/24;
+          allow 192.168.51.2;
+          allow 192.168.51.1;
+          deny all;
+        '';
+      };
+    };
+  };
+
+  services = {
+    grafana = {
+      enable = true;
+    };
+    prometheus = {
+      enable = true;
+      exporters = {
+        node = {
+          enable = true;
+        };
+      };
+      globalConfig.scrape_interval = "10s";
+      scrapeConfigs = [{
+        job_name = "node";
+        static_configs = [{
+          targets = [ "localhost:${toString config.services.prometheus.exporters.node.port}"];
+        }];
+      }
+      {
+        job_name = "dendrite";
+        static_configs = [{
+          targets = [ "localhost:9008"];
+        }];
+      }
+      ];
     };
   };