add zone collection

Signed-off-by: Andrea Corna <andrea.corna.ac.91@gmail.com>
add handler error dishes

Signed-off-by: Andrea Corna <andrea.corna.ac.91@gmail.com>
add validator zone

Signed-off-by: Andrea Corna <andrea.corna.ac.91@gmail.com>
add generate page

Signed-off-by: Andrea Corna <andrea.corna.ac.91@gmail.com>