Replying to myself here - the /content/startup/index.html file is
different from the /content/starter/index.html one, so no change is
required here.
Sorry for the late reply - so fixed perfectly via SLING-8615. The file
/content/startup/index.html used to be loaded from starter-startup [1],
I only recently moved it to starter-content. It's a good thing to have
it closer together with the regular content, unfortunately for
/content/starter/index.html we can still not use scripts and resources
as the Sling engine is not ready yet during early startup.
-Georg
[1]
https://github.com/apache/sling-org-apache-sling-starter-startup/blob/maintenance/src/main/resources/index.html
