Where do I put manifest JSON?
<link rel="manifest" href="/manifest.json">
.webmanifest extension is specified in the Media
type registration section of the specification (the response of the manifest file should return
Content-Type: application/manifest+json). Browsers generally support manifests with other
appropriate extensions like
If the manifest requires credentials to fetch, the
attribute must be
use-credentials, even if the manifest file is in the same origin as the current page.
<link rel="manifest" href="/app.webmanifest" crossorigin="use-credentials">