Support onlyoffice JWT Token for security

[alexshliu]

Is your feature request related to a problem? Please describe.

From official guide: Installing ONLYOFFICE Docs Community Edition for Docker on a local server

Starting from version 7.2, we added a random generation of JWT secret. If JWT secret is not specified with the environment variable, it leads to its re-generation during every VMs or physical server reboot, so there might be problems in integrations. To avoid this issue, specify your own value in -e JWT_SECRET=my_jwt_secret.

应该如何在 cloudreve 中传递这个参数？

Describe the solution you'd like 最好可以直接在 cloudreve 的管理面板中进行配置。

[HFO4]

Cloudreve 使用的是 WOPI 接口，不支持 JWT 鉴权。