Make the official Heroku buildpack for Node.js compatible with other buildpacks

The maximum allowed Heroku slug size (after compression) is 500MB (with 300MB soft limit). Image-heavy apps can somethings butt up against this limit, especially when using multiple buildpacks. If you're using Node.js to compile your front-end assets, but not to run your app, you may be able to save a large amount of space by deleting the node_modules directory before slug compilation.

First, set the Node.js buildpack to compile your assets:

$ heroku buildpacks:set heroku/nodejs

Next, add whichever buildpack runs your app:

$ heroku buildpacks:set --index 1 heroku/ruby

Finally, add the Node Cleanup buildpack to get rid of the node_modules and client/node_modules directories:

$ heroku buildpacks:set --index 2 https://github.com/whisperlabs/heroku-buildpack-node-cleanup

For more general information about buildpacks on Heroku:

• Using Multiple Buildpacks for an App
• Slug Compiler