It would be nice if IA provided an easy way to get a blank Ignition gateway backup for restoration. This would be especially useful for people, like myself, who often develop one-off systems from scratch.
Not exactly what you're looking for, but I think Docker might be useful for your usecase(s) Ignition with Docker Course at Inductive University. Once you set it up and pull the image, it takes less than a minute to spin up a new instance of Ignition. Another advantage is that you can pull specific image with a certain Ignition version if the project requires.
Alternatively, you can make a backup with a fresh Ignition installation (uninstall then reinstall).
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Thought the fresh install might be the case. That's what I did, now I have a blank one to restore some other time.
I think if you want a totally blank gateway you could change your gateway backup from .gwbk to .zip and then delete the config.idb and change back to .gwbk. Then when you go to restore, it should generate a new config.idb but just with the blank gateway config. I could be wrong though.
You will lose the image library. The installer explodes those as files, and first startup moves them into the config DB.
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