add export for dedicated server

scripts/ui/play_menu.gd

@@ -8,6 +8,10 @@ extends Panel
 
 
 func _ready() -> void:
+	if OS.has_feature("dedicated_server") or DisplayServer.get_name() == "headless":
+		Networker.host_game(true)
+		return
+
 	_host_button.pressed.connect(_on_host_button_pressed)
 	_join_button.pressed.connect(_on_join_button_pressed)
 	Networker.network_error.connect(_on_networker_network_error)