Is there a way to redirect all[1] requests to index.html? The use case is an Ember app that uses history location and is deployed as a static website. In this case, requests to `/whatever` still need to serve index.html and let Ember handle the routing. Can GAE app.yaml specify rules like this?

I ran into this problem with S3 and ended up writing a simple server to handle it and deploying to Heroku.

[1] By all, I mean all except the ones to /assets or something similar.