change messaging to specify that Heroku is looking for the .yarn file (and not that Yarn does not support node modules)
change messaging to specify that Heroku is looking for the .yarn file (and not that Yarn does not support node modules)

Scalingo/nodejs-buildpack,heroku/heroku-buildpack-nodejs,heroku/heroku-buildpack-nodejs,heroku/heroku-buildpack-nodejs,Scalingo/nodejs-buildpack,Scalingo/nodejs-buildpack,heroku/heroku-buildpack-nodejs,heroku/heroku-buildpack-nodejs,Scalingo/nodejs-buildpack,Scalingo/nodejs-buildpack