text: Title: [Migrated] How to update app without downtime?
  Body: Originally from: https://github.com/Miserlou/Zappa/issues/2103 by [xncbf](https://github.com/xncbf)
  
  In the case of AWS Beanstalk, can be deployment without downtime through environment replication and url swap. Is it possible to perform a similar practice on Zappa?