That’s tricky, because Ember/Rails would try to interpret that as an app route … which doesn’t exist.
I would step back if I were you and reconsider what you are ultimately, functionally trying to achieve and see if there isn’t another way to go about it?
One option is to use this:
Another option might be to host that page on a sub-domain, rather than a folder (and all that entails).
Page publishing and subdomain won’t work. The only option other than hosting in the folder is hosting the folder on a new domain, which won’t be good for SEO as I won’t have all the authority of my actual domain.
Is there any way to fulfill my purpose using a plugin?