heroku path

I want to use `/blog` as the url but I created a `PostsController` so I have to set the `path` option in the routes.

    resources :posts, path: '/blog'

This is working fine in development but when I deploy it to heroku, I get a 500.  The logs doesn't seem helpful at all, you'll get the normal log like the one below but the status is 500 so I'm a bit lost on the cause of the issue

    at=info method=GET path=/path_name host=www.example.com request_id=some-random-numbers-here fwd="xxx.xxx.xxx.xxx" dyno=web.1 connect=2ms service=95ms status=500 bytes=37419

And yep, I'm using a custom url so that may also be part of the issue.  What I did to fix it was to change the posts controller to a blog controller.