Update app.js

app.js

@@ -2,7 +2,7 @@ let groups = 0
 let generation = 0
 const express = require('express')
 const app = express()
-const port = 4000
+const port = 3000
 const shell = require('shelljs')
 const cron = require('node-cron');
 const cronRemover = require('node-cron');