base/base.nix: allow setting of ssh keys using an option

base/base.nix

@@ -1,11 +1,20 @@
 # Module: base/base
 { config, lib, pkgs, ... }:
 
+with lib;
+
 let
-  userSSHKeys = [
-    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILiUy2yjIkdryH7pYMdkCNryy9gceqXJ7bhtMvvpPBIk etorres@xenon"
-  ];
+  cfg = config.base;
 in {
+  options.base = {
+    userSSHKeys = mkOption {
+        type = types.listOf types.str;
+        default = [];
+        description = "List of SSH keys to grant to the primary user";
+        example = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILiUy2yjIkdryH7pYMdkCNryy9gceqXJ7bhtMvvpPBIk etorres@xenon";
+    };
+  };
+
   imports = [ ./grafana-alloy.nix ./network.nix ./qemu.nix ./spice.nix ];
 
   time.timeZone = "Etc/UTC";
@@ -54,7 +63,7 @@ in {
 
     shell = pkgs.zsh;
 
-    openssh.authorizedKeys.keys = userSSHKeys;
+    openssh.authorizedKeys.keys = cfg.userSSHKeys;
   };
 
   programs.neovim = {