Support NextJS on-demand revalidation

[jasan-s]

[REQUIRED] Environment info

firebase-tools: 11.25.3

Platform: macOS

[REQUIRED] Test case

Starting with v12.2.0, Next.js supports On-Demand Incremental Static Regeneration to manually purge the Next.js cache for a specific page. This makes it easier to update the site, however it seems firebase hosting does not detect on demand regeneration.

[REQUIRED] Steps to reproduce

Following the steps in this guide add the on demand revalidation (https://nextjs.org/docs/basic-features/data-fetching/incremental-static-regeneration#on-demand-revalidation) api path.

[REQUIRED] Expected behavior

Upon invoking the revalidation api route, the hosting should regenerate a new page.

[REQUIRED] Actual behavior

The hosting never regenerates the page matter how many time the api route is called. And the stale page remains and is continued to be served to users.