Revert "Rename index to index.html"

This reverts commit 529705d375113e26dd3997e4b95e520deeac4c0b.
Revert "Revert "Rename index to index.html""

This reverts commit cc67eaf09f44985278744198f2e9f9c8cd1f481e.
Merge remote-tracking branch 'origin/master'