Revert "Using Flask for Frontend"

This reverts commit 701d21d13867a27a762141c5ce72bed7b7249ce2.
Revert "Revert "Using Flask for Frontend""

This reverts commit 3191c2df2f6116b369526477b41f996a2d649441.
Merge branch 'FrontEnd' of https://github.com/VictorD/QUAS into FrontEnd