Incremental Static Regeneration
- In this example, three posts fetch data using granular ISR.
 - Caches responses are fresh for 60 seconds.
 - Try navigating to each post and noting the timestamp of when the page was rendered. Refresh the page after 60 seconds to trigger a revalidation for the next request. Refresh again to see the revalidated page.
 - Note that the fetch cache can be persisted across builds.