Summary:
When packager is running, visiting localhost:8081 produces ugly 404 "GET / not found"
This diff adds a simple index.html page that has a title and link to documentation.
It's a super tiny detail, but I hope it makes things a little nicer. Improvements are welcome.
Maybe we could include an offline copy of React Native's docs website?
Reviewed By: vjeux
Differential Revision: D3341242
fbshipit-source-id: c8cd4b647e69eb520ea8bc978bea070551225912