nextcloud done

nixos/services/prometheus.nix

@@ -17,6 +17,20 @@ in {
           }
         ];
       }
+      {
+        job_name = "prometheus";
+        static_configs = [
+          {
+            targets = ["localhost:${toString config.services.prometheus.exporters.postgres.port}"];
+          }
+        ];
+      }
     ];
+    exporters = {
+      postgres = {
+        enable = true;
+        runAsLocalSuperUser = true;
+      };
+    };
   };
 }