Bridge Client and Nas.
- tweet大小限制（mqtt 只能一次性传 64k 数据）
- mysql migrate to mongodb
- add tweet bug （index 冲突）
- version control (方便小程序审核发布以及app升级)
- *complete doc(doing)
- *project test
- *system monitor
- *config settings
- *resolve the problem that mini program connect MQTT broker
- upload file with udp
- database tables constructure document
- swagger mock
- mongoDB transaction
- mini program => hpps pictures
- management system
- sequelize migrations
- qcloud databases backup
npm run doc && open ./out/index.html with browser