The images downloaded directly from Docker Hub, or Quay.io are for a limited trial of the Enterprise version of Content Services that goes into read-only mode after 2 days. For a longer (30-day) trial, get the Alfresco Content Services Download Trial.
Note
A Quay.io account is needed to pull the Docker images that are needed for the Transform Service:
quay.io/alfresco/alfresco-transform-routerquay.io/alfresco/alfresco-shared-file-store
The Transform Core Engine (T-Engine) Docker Image is also used by Alfresco Content Services Community Edition, so it is available in Docker Hub:
alfresco/alfresco-transform-core-aio