Feature request

similar to the ".nojekyll", is it possible to include a ".nodocsify" file that prevents docsify from operating on certain folders?

What problem does this feature solve?

adding game or software demos using iframes. Changing the github pages from "/docs" to "/root" does not work either since it messes up docsify's system for getting _sidebar.md for some reason.

What does the proposed API look like?

if you include a ".nodocsify" in a folder, docsify will not operate on that folder and any of its subfolders.

How should this be implemented in your opinion?

I'm not entirely certain, but surely it must be possible to exclude rendering if it encounters a ".nodocsify" file?

Are you willing to work on this yourself?

If the solution is relatively simple, perhaps. (im not very good with javascript)