Make dfid-transition a Rack app
Make dfid-transition a Rack app

Was procfile, but the sidekiq monitor's a rack app – no sense leaving it
to the procfile.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet