How can I set the default sync server URL in self-hosted web app?[Help Wanted]

[SLinHennef]

How can I set the Default Sync Server for the selft hosted web app?

Already tried several approaches for the yml: ` environment:

   - DEFAULT_SYNC_SERVER=https://syncnotes.domain
  - SF_DEFAULT_SERVER=https://syncnotes.domain`

• None of them (tried them seperately) worked. When I launch the web app the sync-server is the official one.

Thanks in advance!