Set up monitoring via Prometheus and Grafana

modules/webstack.nix

@@ -49,6 +49,12 @@
               add_header Access-Control-Allow-Origin * always;
             '';
           };
+          "/nginx_status/".extraConfig = ''
+            stub_status on;
+            access_log   off;
+            allow 127.0.0.1;
+            deny all;
+          '';
         };
       };
       "radicale.coolneng.duckdns.org" = {
@@ -150,6 +156,14 @@
           '';
         };
       };
+      "grafana.coolneng.duckdns.org" = {
+        enableACME = true;
+        forceSSL = true;
+        locations."/" = {
+          proxyPass = "http://localhost:9009/";
+          proxyWebsockets = true;
+        };
+      };
     };
   };