Revert "Delete master.html"

This reverts commit a3c1cd6221bd7098381d1f44b57cbe411f9ff498.
Revert "Delete controller.py"

This reverts commit c9d79143296e1a526d0144d7cf3778c4a97bbf19.
Revert "Delete main.css"

This reverts commit 70e0117a35d585d47e752e3a1bcea0aa0d4d0e28.