SPECULATION_RULES
Chrome's speculation rules for a static site: a page is prerendered while a link to it is pointed at (or pressed), so following it shows it at once. Downloads aren't.
export const SPECULATION_RULES = `<script type="speculationrules">${JSON.stringify({ prerender: [ { where: { and: [ { href_matches: "/*" }, { not: { href_matches: "/*.tar.gz" } }, { not: { href_matches: "/*.tgz" } }, ], }, eagerness: "moderate", }, ], })}</script>`