Heroku wrongly detecting my Node app as a Ruby app

Question

I have a Node project that is using Bundler and Guard to handle my pre-compilations steps. This means that I have a Gemfile in the root of my project along with the package.

Answer 1

It seems there's a new way to do this as BUILDPACK_URL is now deprecated, explained here, but essentially the command is:

$ heroku buildpacks:set heroku/nodejs

You may also specify a buildpack during app creation:

$ heroku create myapp --buildpack heroku/nodejs

Answer 2

The solution to this, with a lot of help from Heroku Support is: use a build pack!

Override the Heroku default buildpacks by specifying a custom buildpack in the BUILDPACK_URL config var

$ heroku config:add BUILDPACK_URL=https://github.com/heroku/heroku-buildpack-nodejs

You can also specify a buildpack during app creation

$ heroku create -s cedar --buildpack https://github.com/heroku/heroku-buildpack-nodejs

Simple when you know it. Some more documentation can be found at Heroku Dev Center