test with APP_CONFIG on Heroku Eu
unable to see puts, trying with raise
remove raise
put back the initial load_config and initializer files. Had to turn on ENV vars. https://devcenter.heroku.com/articles/labs-user-env-compile
remove puts
add fallback if ENV vars not set.
Add gem 'rails_12factor', hopefully this will get thing running again.
Oh dear, RACK_ENV should not be forced to development in production
Setup Split in the Redis initializer