xhunter-server is used to communicate between attacker and victim. It is very easy to host on heroku. follow the below steps:
After login, click the below Deploy button.
<your_app_name>
and click Deploy app
button.view app
and If you see Welcome to Xhunter Backend Server!!
then you have successfully created your server.https://<your_app_name>.herokuapp.com
in xhunter_v1.6.apk. during building payload and listening connection.