DockerRequirement

Indicates that a CommandLineTool or ExpressionTool should be run in a Docker or Docker-compatible (e.g. Singularity, udocker) container, and specifies how to fetch or build the image (dockerPull, dockerImport, dockerLoad, or dockerFile). If listed under hints, the platform may run the tool in the container; if listed under requirements, it must. See the CWL v1.2 CommandLineTool spec — DockerRequirement for the full behavior, including bind-mount and entrypoint handling.