link aggregation: resize images for epub

Signed-off-by: Yuichi Ito <ito.yuichi0@gmail.com>
rest_firewall: resize images for epub

Signed-off-by: Yuichi Ito <ito.yuichi0@gmail.com>
rest_router: resize images for epub

Signed-off-by: Yuichi Ito <ito.yuichi0@gmail.com>