Add/example google cloud storage

[vsoch]

This will close #605

Note that the GCP bucket is not a registry, it's a cache for all containers / module files to be mounted somewhere.

[evalanguaria]

@vsoch I am sorry for the late reply, was swamped with work and couldnt test this. I have now tested it and was wondering if it was possible to put the modules and containers in their own folders so that it is easier to provide them in the settings.yml file. If this is already taking too much of your time, you can close it and I can try and incorporate the changes I need. Thank you.

[vsoch]

@evalanguaria that should be an easy change - before you run the script, just edit your shpc settings.yaml config and ensure the containers/modules are installed to different locations. You will then need to update the script to handle the change in location (instead of just root you will have two!)

This is the simplest implementation that I would like to provide for the example for other users, so I think it's best that if you'd like it customized you are free to do something else.

[evalanguaria]

@vsoch yes that makes sense. I will make the necessary modifications. Thanks a lot again for everything.