Enable mongodb

desktop.nix

@@ -54,6 +54,8 @@ in
       };
     };
 
+    services.mongodb.enable = true;
+
     environment.systemPackages = with pkgs; [
       atom
       firefox

qemu.nix

@@ -8,6 +8,7 @@
   config = {
     virtualisation = {
       memorySize = 1536;
+      diskSize = 1024;
       writableStoreUseTmpfs = false;
     };
     networking.hostName = "liucs";