verify code
npm install jm-verifycode
npm start
npm run cluster
基本配置 请参考 [jm-server] (https://github.com/jm-root/jm-server)
redis [] Redis数据库uri
secret [''] 密钥
verifyCodeKey ['verifycode'] Redis数据库主键
verifyCodeExpire [60] 验证码过期时间, 单位秒(可选)