Make Search work for apps

[1peter10]

(I really hope this won't break the entire concept.)

[1peter10]

This appears to be fixable, in two ways (that can be combined, so it would be best to do both):

1. Making description content more editorial and have it contain the important keywords and put it into the body of the page. Also, the content that's now in page.extra.summary could be put into page.description to further improve search. (I first thought about "notice", but writing a notice for every app feels more problematic, as "notice" is meant to describe the state of the app even more.)
2. Working on the theme (as in commit d0f959c) , modifying and recompiling Zola to index more or all of the frontmatter variables (if necessary), has been tried, as maintaining a fork is not what should be in scope for this project and upstream mergability is not too likely, as this is likely outside of Zola's original scope.

Links that might help regarding working on 2.:

• https://zola.discourse.group/t/search-improvement/344
• https://zola.discourse.group/t/building-search-index-with-title-and-description-only/198/9
• Search improvement getzola/zola#961