refactor: remove default.nix file in module dir

config.nix

@@ -1,6 +1,8 @@
 { config, lib, pkgs, rpi5-kernel, ... }:
-{
-  imports = [ ./hardware-configuration.nix ./modules ];
+let modules = builtins.map (mod: modules/${mod}.nix);
+in {
+  imports =
+    modules [ "acme" "fail2ban" "forgejo" ];
 
   boot.kernelPackages = rpi5-kernel.legacyPackages.aarch64-linux.linuxPackages_rpi5;
   boot.loader.systemd-boot.enable = true;

flake.nix

@@ -20,6 +20,7 @@ outputs = inputs@{ self, nixpkgs, agenix, ... }:
         modules = [
           { _module.args = inputs; }
           agenix.nixosModules.default
+          ./hardware-configuration.nix
           ./config.nix
         ];
       };

modules/default.nix

@@ -1,8 +0,0 @@
-{ ... }:
-{
-  imports = [
-    ./acme.nix
-    ./fail2ban.nix
-    ./forgejo.nix
-  ];
-}