After the staging deployment slot has been swapped to production, I know have the old production code sitting in the staging slot. This is fine in case I need to roll back. However, after a while, I know there are no problems.
It seems that the process is not that I should update the staging slot with the latest code in order to make it mirror the production slot. This can be a hassle to upload all over again.
Can I mirror the files from the production slot back to the staging slot so that they are in sync again?
I'm sure you can do this anyway. But you shouldn't.
Do you work on production for staging ?
I suggest you to use Continuous integration in Azure using Kudu
Then you will just click Sync .