Implemented inline error function for server errors

Client/app.js

@@ -26,7 +26,7 @@ const {
 
 var app = express();
 var discordToken = process.env.TOKEN;
-var port = process.env.HTTP_PORT || '3000';
+var port = process.env.HTTP_PORT || '3010';
 
 const discordClient = new Client({
   intents: [
@@ -86,7 +86,29 @@ async function runHTTPServer() {
 	var server = http.createServer(app);
 	server.listen(port);
 
-	server.on('error', libUtils.onError);
+	server.on('error', (error) => {
+    if (error.syscall !== 'listen') {
+      throw error;
+    }
+  
+    var bind = typeof port === 'string'
+      ? 'Pipe ' + port
+      : 'Port ' + port;
+  
+    // handle specific listen errors with friendly messages
+    switch (error.code) {
+      case 'EACCES':
+        log.ERROR(bind + ' requires elevated privileges');
+        process.exit(1);
+        break;
+      case 'EADDRINUSE':
+        log.ERROR(bind + ' is already in use');
+        process.exit(1);
+        break;
+      default:
+        throw error;
+    }
+  });
 
 	server.on('listening', () => {
 		log.INFO("HTTP server started!");