user
The user to use inside the container. This parameter maps to User in the Create a container section of the Docker Remote API and the --user option to docker run.
When running tasks using the host network mode, don't run containers using the root user (UID 0). We recommend using a non-root user for better security.
You can specify the user using the following formats. If specifying a UID or GID, you must specify it as a positive integer.
useruser:groupuiduid:giduser:giuid:group``
This parameter is not supported for Windows containers.