Index.html keeps getting regenerated

(let me start with an apology; I’m sure this is a dumb question, but
I’ve looked everywhere and can’t find an answer. Thanks in advance for
your patience)

I’m in the middle of deploying an app, and it looks as though
everything is set up properly as far as my routes.rb and whatnot.
However, even though I’ve deleted the public/index.html file, whenever I
hit the application the index.html file gets regenerated, and it now
displays a “you are being redirected” message and a link to the
controller I’ve defined in routes.rb.

That last part is what makes me think that routes.rb is set up correctly
(or close to it); the link in the newly-generated index.html always
reflects whatever entry I put in routes.

If you can help me figure out how to get this file regeneration to stop,
I would very much appreciate it.