Update environment variable for Heroku apps
Update environment variable for Heroku apps

In #2805 we changed the way we render breadcrumbs and sidebars. Instead
of using the content-api we use the content-store as the data source
for all the information. We are also using govuk_navigation gem to
generate GOV.UK component data.

alphagov/smart-answers,alphagov/smart-answers,aledelcueto/smart-answers,alphagov/smart-answers,aledelcueto/smart-answers,alphagov/smart-answers,aledelcueto/smart-answers,aledelcueto/smart-answers