fixing subscrition index hardcode

frontend/src/services/chat.service.js

         this.subscriptions = [MAIN_CHANNEL, 'Channel-LosAngeles']
         this.listeners = {
             status: async e => {
-                await this.publish(this.subscriptions[2], testMessage)
+                await this.publish(this.subscriptions[0], testMessage)
                 if (e.category !== 'PNConnectedCategory') return
             },
             message: this._onMessage,