start adding postgres wrapper

flake.nix

@@ -3,5 +3,9 @@
 
   inputs = { };
 
-  outputs = _: { pkgs }: import ./lib.nix { inherit pkgs; };
+  outputs = _: {
+    lib = {
+      mkLib = pkgs: import ./lib.nix { inherit pkgs; };
+    };
+  };
 }

lib.nix

@@ -43,4 +43,12 @@ in
 
       '';
     };
+  mkPostgres =
+    {
+      default_config ? false,
+      ...
+    }:
+    let
+    in
+    { };
 }