There are a couple of different ways (that I know about) to encapsulate a website (or just a subdirectory?) into an executable. There is Web2Executable and Nativefier via nodejs.

I'm basically only noting these here on the chance that someday I may do actual work with Squiffy or Twine.

I've cached a copy of Web2Executable on my Box.com account and here on my pcloud account.