Move overlays up so that systempackages can also access them; use a mongodb package from bryanasdev000
diff --git a/src/apps/system/mongo.nix b/src/apps/system/mongo.nix
new file mode 100644
index 0000000..e95f8b5
--- /dev/null
+++ b/src/apps/system/mongo.nix
@@ -0,0 +1,7 @@
+{ nixpkgs-mongodb-fix, ... }: {
+  services.mongodb = {
+    package = (import nixpkgs-mongodb-fix { inherit system; config = { allowUnfree = true; }; }).mongodb-4_4;
+    enable = true;
+    dbpath = "/tmp/mongodb";
+  };
+}