add mutiserver support

[phil616]

add mutiserver support

1. mysql support
2. backups
3. nginx
4. firewall

[Lourvine]

mult server support require the outer side system config, one cannot support multapps within the fastapi. one possible solution is add the cache and one 'DAO' gather them to a docker compose and manage them together. for example:

• redis 1 app 1 mysql 1
• redis 2 app 2 mysql 1 etc and you need an nginx to manage upstreams. the server deploy that nginx is the api server.