fix: secure wss for prod

src/environments/environment.prod.ts

@@ -22,7 +22,7 @@ export const environment = {
 export const MQTTconfig: IMqttServiceOptions = {
   hostname: 'broker.hivemq.com',
   port: 8000,
-  protocol: 'ws',
+  protocol: 'wss',
   path: '/mqtt'
 };