fleshed out server configuration a bit more before installation

modules/server/default.nix

@@ -5,4 +5,9 @@
   wallpaper,
   username,
   ...
-}: {}
+}: {
+  imports = [
+    ./services.nix
+    ../sys/software/nixvim
+  ];
+}

modules/server/programs.nix

@@ -0,0 +1,9 @@
+{...}: {
+  programs = {
+    zsh.enable = true;
+    gnupg.agent = {
+      enable = true;
+      enableSSHSupport = true;
+    };
+  };
+}

modules/server/services.nix

@@ -13,4 +13,8 @@
     "d /home/${username}/inbox 0770 ${username} users -"
     "d /home/${username}/outbox 0770 ${username} users -"
   ];
+  services.openssh = {
+    enable = true;
+    allowSFTP = true;
+  };
 }