don't need to set database.yml, it is set automatically.
heroku addons:add heroku-postgresql:hobby-dev -a carshare-all
==============
Bower is run on npm and has to require a custom buildpack on heroku. WE can use rails-assets.org instead
source 'https://rails-assets.org' do
gem 'rails-assets-swiper', '3.0.6'
end
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