For WDL questions, see the WDL specification and WDL docs.
For Cromwell questions, see the Cromwell docs and please post any issues on Github.
AWS Batch - how to use pre-existing job definition or specify docker container
The documentation for using Cromwell with AWS Batch does not tell me how to use either a pre-existing job definition or how to specify the docker image used. If I run the demo, it creates a job definition using the ubuntu:latest. How do I specify a different docker image?