How to deploy html to heroku?

so I have home.html file, basically it's the whole source code of html. and I also have index.php :<?php include_once("home.html"); ?>. but it keeps on saying language is not detected.

! No default language could be detected for this app. HINT: This occurs when Heroku cannot detect the buildpack to use for this application automatically. See http://ift.tt/JvAYiJ ! Push failed