Can't deploy html css and js app to heroku, “NOTICE: No runtime required in composer.lock; using PHP ^7.0.0”

Question

I have a simple project which has just an html, a folder with a css file, another folder with a js file, and another with images. In order to deploy it to heroku, I read I had to create the index.php, require the home.html and create a composer.json with only a {} in it, as it says: Uploading a static site on Heroku?

When I use the command git push heroku master to deploy it, it complains about this: NOTICE: No runtime required in composer.lock; using PHP ^7.0.0 NOTICE: No runtime required in composer.lock; using PHP ^7.0.0 ., and the project is not available on the link provided.

If it helps, my project's structure is as simple as this:

I don't know if that Notice is just a warning, but I find it very strange that Heroku can't deploy such a simple project.

Answer 1

I'm not sure where you were suggested to use just {} , as the doc says to use the following within composer.json :

{
  "require": {
    "php": "^7.2.0"
  }
}

https://devcenter.heroku.com/articles/php-support#php-runtimes

Answer 2

Please move your index.php to folder and point via Procfile. Also make sure that your composer.json is valid.