Add documentation about Rock-on restore

[Stitch10925]

Fixes: https://forum.rockstor.com/t/after-reinstall-rockons-are-running-but-not-showing-in-webui-as-installed/8640

• Add information about Rock-on recovery
• Discourage use of system drive for Rock-on configuration storage

Checklist

• [X] With the proposed changes no Sphinx errors or warnings are generated.
• [X] I have added my name to the AUTHORS file, if required (descending alphabetical order).

[phillxnet]

Just copying in a pic of the render of the new warning section on the Rock-ons-root:

to assist further review is required.

[Stitch10925]

@phillxnet

Thanks for adding an explanation to the suggestion. This provides some needed context in some cases. I accepted your changes.

[Stitch10925]

Currently it looks to render as I think you intended

I would hope so. I ran it through Sphinx and hosted the pages using Python as described in the documentation (which was really great and easy to set up).

[phillxnet]

@Stitch10925 I think we are almost there now. Our back-end deployment (to PRODUCTION) treats Sphinx warnings as errors (@FroggyFlox maybe we should do the same on our GitHub Task):

Note the following, in the now enabled for your doc pull requests:

https://github.com/rockstor/rockstor-doc/actions/runs/4028122554/jobs/6931419590#step:5:84

We have a remaining underline warning issue on a couple of the headers.

Do you fancy popping in a commit to resolve this. Much appreciated. The GitHub Web-UI makes this sort of change a little challenging. But once committed the GitHub task should re-run and you can check if the warnings have been resolved. My fault as I should have enabled the GitHub task earlier. Our Back-end deployment double check however so at least we caught this there.

We didn't use to fail on warnings but they end up building up and then it's difficult to see what's going on, where as treating them as errors means we get a deployment failure to help flag mistakes such as mine here.

[phillxnet]

Copying in back-end Sphinx command used:

sphinx-build -b html -E -W . _build/html

[Stitch10925]

Sorry for the delay guys!

I fixed the warnings. Too bad the action does not run on its own but needs approval. I hope everything is fine this time.

[phillxnet]

@Stitch10925 Thanks for persisting with this one. Sometimes it takes a little back and forth.

And thanks again for seeing to this previously missing area in our docs. Much appreciated.

I'll merger directly and publish shortly.

@FroggyFlox Thanks for the follow-up review. Again much appreciated.

[phillxnet]

PR product PRODUCTION published.