Remove "Index of /___" Pages

[jeromew21]

https://pioneers.berkeley.edu/compete/

Yikes.

[jeromew21]

This is related to the earlier issue about serving the site as a static site with the ruby dev server.

Probably could be fixed by adding index pages to the exposed subfolders.

[kev-chien]

So if we change it to production mode this will disappear?

Also, I think we could look into redirecting such URLs, I believe there were some examples in the repo. But it would be something to move away from in the long-term.

[jeromew21]

Yeah, switching to a production server would probably fix this, but we should also look into redirects, because otherwise we'd just get 404 errors on these pages.