Update the parent image in the startup script
Update the parent image in the startup script

As we have been using `nanshe/nanshe_notebook` as the parent image of
the `Dockerfile`, update the parent image in the update script to point
to it as well instead of `nanshe/nanshe`.

DudLab/docker_nanshe_workflow,nanshe-org/docker_nanshe_workflow,DudLab/docker_nanshe_workflow,nanshe-org/docker_nanshe_workflow