Revert "core: structuring index.html"
Revert "core: structuring index.html"

This reverts commit fa1a42d134634767206ec13ead6cdbdaec0be074.

chjasonwu/arraysanatomy,arraysanatomy/arraysanatomy,chjasonwu/arraysanatomy,arraysanatomy/arraysanatomy