Set Plek context for backend machines in AWS Whilst `backend` apps will be located in AWS, `publishing-api` remain in Carrenza.
Set Plek context for backend machines in AWS
Whilst `backend` apps will be located in AWS, `publishing-api`
remain in Carrenza.

This updates the Plek environment variable overrides so these
services can still be accessed by `backend` apps.

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