Because Angular SSR is not very efficient, after discussion with
the Google Scholar team we realized a compromise would be to only
use SSR for pages in the DSpace sitemap (and the home page).
When inlining CSS, Angular Universal needs to extract critical styles.
This seems to take up a significant chunk of processing time.
However, loading may appear less smooth when this feature is disabled.
Added to the configuration to make it easier to A/B test this without a full re-build.
(cherry picked from commit 38a058d7af)
