refactor folder structure

hosts/fw/configuration.nix

@@ -4,7 +4,6 @@
     ./utils/bento.nix
     ./utils/modules/sops.nix
     ./utils/modules/lego/lego.nix
-
     ./utils/modules/nginx.nix
 
     ./utils/modules/autoupgrade.nix

hosts/nb/configuration.nix

@@ -7,6 +7,7 @@ let
   unstable = import (fetchTarball https://nixos.org/channels/nixos-unstable/nixexprs.tar.xz) {
     config = { allowUnfree = true; };
   };
+
   impermanence = builtins.fetchTarball "https://github.com/nix-community/impermanence/archive/master.tar.gz";
 in {
   nixpkgs.config.allowUnfree = true;