replace socket.io usage with WebSockets

lib/ping.js

@@ -4,6 +4,7 @@ const minecraftJavaPing = require('mc-ping-updated')
 const minecraftBedrockPing = require('mcpe-ping-fixed')
 
 const logger = require('./logger')
+const MessageOf = require('./message')
 
 const config = require('../config')
 
@@ -125,7 +126,9 @@ class PingController {
     // Generate a combined update payload
     // This includes any modified fields and flags used by the frontend
     // This will not be cached and can contain live metadata
-    this._app.server.broadcast('update', serverRegistration.getUpdate(timestamp, resp, err, version, updateHistoryGraph))
+    const updateMessage = serverRegistration.getUpdate(timestamp, resp, err, version, updateHistoryGraph)
+
+    this._app.server.broadcast(MessageOf('updateServer', updateMessage))
   }
 }