move all html source to app folder.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
modified all config for moving html source to app folder.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
add django-html in an HTML minifier

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>