Using Bower with Play
When using bower with play, be mindful that the assets that you will use are stored within the /dist folder. Now, you may not think this is a big deal, but if you check the default .gitignore file, you'll discover that on one single line it has these four characters:
distThat is enough to ignore all dists within your application. Just delete the line, run git status, and you'll discover you'll have some new files to add to your repo.
Commit and push to Heroku. You should be good to go by now.