Just like Pipeline Definitions, custom Rendition Definitions need to be placed in a directory of the Repository. There are similar properties that control where and when these definitions are read, and the same approach may be taken to get them into Docker Compose and Kubernetes environments.
rendition.config.dir=shared/classes/alfresco/extension/transform/renditions/
rendition.config.cronExpression=2 30 0/1 * * ? rendition.config.initialAndOnError.cronExpression=0/10 * * * * ?
In a Kubernetes environment: kubectl create configmap custom-rendition-config --from-file=custom-renditions.json