updated README.md to reflect new docker config changes
updated README.md to reflect new docker config changes

ministryofjustice/defence-request-service-auth,ministryofjustice/ds-auth,ministryofjustice/defence-request-service-auth,ministryofjustice/defence-request-service-auth,ministryofjustice/ds-auth,ministryofjustice/ds-auth,ministryofjustice/ds-auth,ministryofjustice/defence-request-service-auth