Return data to master container

[Ross-Alexandra]

Once a user container has completed and has processed data, this data needs to be returned to the master container. This ticket represents the work required to create the infrastructure for the return, as well as getting the return.

Acceptance Criteria

• Once a user container has completed its run, the processed data is returned to the master container for later use.

[Ross-Alexandra]

As part of the final push, docker within docker was phased out. This is no longer needed.