[Feature Request] Backup prev version of dedicated server

### Description

So, sometimes we can get broken version of dedicated server, for example:

```js
Update available:
Current build: 0 // broken
Available build: XXXXXX

```

So, I want to ask add feature for "regenerate" valid version of server (prev version or version before update).
Before server update do some backup all files what required to check prev version of server.
That required to fast update without use validate if something do not like should while updating.

For example, we can backup all "version files" in folder like `backups/`, if version is "0", try revert version by using backuped files. If update is successfull, old version files should be deleted. That would be repeat every update try.