I think that would be part of your deployment process? Perhaps you could have a script that setup the relevant files in ~/.config/joplin-desktop. Now that we move many settings to settings.json it should be relatively easy to do so. See the settings.json schema at https://joplinapp.org/schema/settings.json
Thanks for the schema link!
I see..
Under windows is same folder undeer %userprofile%\.config\joplin-desktop
Having a login script is not optimal for speed... I was hoping that there is some switch to inject settings in installer or that placing default settings file in example C:\Program Files\Joplin so there would be no need to edit user space if all users(existing and new) on same machine use same default settings.