also refactor nixos modules

modules/nixos/services/backup/borg.nix

@@ -0,0 +1,38 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: let
+  inherit (lib) mkIf mkEnableOption;
+
+  cfg = config.sneeuwvlok.services.backup.borg;
+in {
+  options.sneeuwvlok.services.backup.borg = {
+    enable = mkEnableOption "Borg Backup";
+  };
+
+  config = mkIf cfg.enable {
+    programs.ssh.extraConfig = ''
+      Host beheer.hazelhof.nl
+        Port 222
+        User chris
+        AddressFamily inet
+        IdentityFile /home/chris/.ssh/id_ed25519
+    '';
+
+    services = {
+      borgbackup.jobs = {
+        media = {
+          paths = "/var/media/test";
+          encryption.mode = "none";
+          # environment.BORG_SSH = "ssh -4 -i /home/chris/.ssh/id_ed25519";
+          environment.BORG_UNKNOWN_UNENCRYPTED_REPO_ACCESS_IS_OK = "yes";
+          repo = "ssh://beheer.hazelhof.nl//media";
+          compression = "auto,zstd";
+          startAt = "daily";
+        };
+      };
+    };
+  };
+}