Local:

npm install
bower install
echo FACEBOOK_APP_ID=12345 >> .env
echo FACEBOOK_SECRET=abcde >> .env
foreman start

Heroku:

heroku create --stack cedar
git push heroku master
heroku config:add FACEBOOK_APP_ID=12345 FACEBOOK_SECRET=abcde

Enter the URL for your Heroku app into the Website URL section of the Facebook app settings page, hen you can visit your app on the web.