Deploy PHP project with Yarn to Heroku

Question

Locally I simply run composer install and yarn install, but when pushing to Heroku only composer dependencies get installed, but not Yarn components. I can't seem to find a way for Heroku to trigger Yarn components installation.

Answer 1

I just needed to add the heroku/nodejs buildpack inside Heroku application's settings page, alongside the already present heroku/php. The next deploy then also installed the yarn components.