User notification when no entrypoint is set/ empty application
we already have a basic notification with a link to the README when no entrypoint is set, but we need a view or look of the application if the application is empty for the user.
no entrypoint set, no configuration provided
Display only header without panel: instead of panel error message component with error information. check the notification epic for still missing error notification: https://gitlab.gwdg.de/groups/subugoe/emo/-/epics/7