Don't ask for all old messages, retained message is enough

main.js

@@ -13,7 +13,7 @@ const mqtt_port = process.env.MQTT_PORT;
 
 // Create an MQTT client instance
 const options = {
-  clean: false, // We want to see door messages we missed while we were anyway
+  clean: true,
   connectTimeout: 5000,
   clientId: 'nodejs_door_listener',
   username: process.env.MQTT_USER,