By following the Content Security Policies specified in the Configuration section you will be able to use Conversation24 software in your domain without any problems and with a strong and secure enough CSP.
The only consideration from your side is to enable unsafe-inline
or '<hash-algorithm>-<base64-value>'
in your style-src
policy if you want to use custom CSS.
If you go with the use of hashes you need to maintain those hashes whenever you make changes on your custom CSS.
Finally if you would like to display Campaign logos or Agents avatars in your chat you would need to enable data
in your img-src
policy.