Is there a way to fetch static / local data at build time on each page (_app / _document)?

[ConsoleTVs]

I want to make use of the static optimization to generate a full static website (without SSR). I have some function that loads some data and I would like to have it available on every page (or maybe mutate some context?). Is there a way to do that in nextjs? getStaticProps does not seem to work on _app or _document.

[timneutkens]

Duplicate of #10949