Use the multi-buildpack for Heroku.
Specify git extension on buildpacks.
Reverse order of buildpacks.
Add node_modules to .gitignore.
Init package.json.
Load Python before Heroku and add a postinstall script to package.json.
Install Gulp and move post install to scripts/.
Ignore distribution files.
Add dist/static to STATICFILES_DIRS and remove django-bower settings.
Use Gulp for ngAnnotate.
Uninstall django-bower.