feat: init backup module

machines/akhaten/stalwart.nix

@@ -57,6 +57,8 @@
     };
   };
 
+  services.backup.includes = [ "/var/lib/stalwart-mail/db" ];
+
   age.secrets.stalwart-admin-hash = {
     file = ../../secrets/stalwart-admin.age;
     path = "/var/lib/stalwart-mail/admin-hash";

machines/gustave/borg.nix

@@ -0,0 +1,16 @@
+{ pkgs, ... }:
+{
+  users.users.borg = {
+    home = "/home/borg";
+    group = "borg";
+    isNormalUser = true;
+    openssh.authorizedKeys.keys = [
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIAziNbLEO9D69xUGPGEq3eXYauFuOlvhqQTwpLNKjFqs julien@tower"
+    ];
+
+  };
+  users.groups.borg = { };
+
+  environment.systemPackages = with pkgs; [ borgbackup ];
+
+}

machines/gustave/default.nix

@@ -9,6 +9,7 @@
     ./hardware.nix
     ./home-julien.nix
     ./nsd.nix
+    ./borg.nix
   ];
 
   machine.meta = {