As we transition to the new Hyland Community, some post links may be temporarily disrupted as we finalize redirects. We apologize for the inconvenience and are working to resolve this as quickly as possible. Details.
I recently wrote this blog post https://www.ziaconsulting.com/developer-help/using-docker-alfresco-process-services/ that gives instructions for getting started with Alfresco Process Services (APS) using docker. It includes additional details beyond what can be found in the APS docs and provides more of a step by step guide for starting out.