Update ns-aws.sslip.io's HTML assets
Update ns-aws.sslip.io's HTML assets

i.e.: <https://52-0-56-137.sslip.io/>

Previously I didn't update `index.html` properly because it wasn't
documented, and the content had become stale.

cunnie/sslip.io,cunnie/sslip.io,cunnie/sslip.io,cunnie/sslip.io