Set EFG port to 3019
Set EFG port to 3019

As discussed with @nickstenning.

We don't have a registry of ports for apps - the Procfile for the
development VM is a close as we get. Aligning production with
development.

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