项目地址
https://www.shiyanlou.com/courses/609/labs/2007/document
flask的中文文档
http://docs.jinkan.org/docs/flask/quickstart.html
短信验证码第三方平台
https://leancloud.cn/dashboard/messaging.html?appid=cXquOs0vdaep40R2CTJdhdOW-gzGzoHsz#/message/sms/conf