Add sshd to desktop profile

hosts/desktop.nix

@@ -21,11 +21,11 @@ with lib.my;
   console.keyMap = "uk";
 
   services.printing.enable = true;
-  services.tailscale.enable = true;
-  networking.firewall = {
-    checkReversePath = "loose";
-    trustedInterfaces = [ "tailscale0" ];
-    allowedUDPPorts = [ config.services.tailscale.port ];
+  services.openssh = {
+    enable = true;
+    passwordAuthentication = false;
+    permitRootLogin = "no";
+    startWhenNeeded = true;
   };
 
   sound.enable = true;