This is a Heroku buildpack for using jpegoptim in your application.
It is designed to be used with heroku-buildpack-multi to combine it with the appropriate real buildpack for your app.
Or even heroku added built-in multi buildpack support .
Add a .buildpacks file to the root of your repo that contains this buildpack URL and your real buildpack URL:
https://github.com/yagainc/heroku-buildpack-jpegoptim
https://github.com/heroku/heroku-buildpack-ruby
Or
heroku buildpacks:add https://github.com/yagainc/heroku-buildpack-jpegoptim
You can verify that everything is properly installed by running the following command:
$ heroku run "jpegoptim -V"