Fix Heroku deployment when both composer.json and package.json exist

[jbrooksuk]

Heroku deployment will break when there is a composer.json and package.json as the buildstep favours Node.js deployment over PHP.

I know that there are ways to change the buildpack when creating an app, but we need to investigate whether this is possible from within app.json.

We'll probably want to get in touch with @heroku themselves on this.

[Salakar]

You can specify the build pack in app.json

    "env": {
        "BUILDPACK_URL": "https://github.com/heroku/heroku-buildpack-php"
    }

Not sure if that's what you're after?

[jbrooksuk]

@Salakar that's perfect, I was wondering if it's something that was set using the heroku command, I forgot it's just an env var.