fix: serve static files from pwa if not found in api

[ibousfiha]

Hi, this PR is to serve static files like svgs from pwa if not found in api.
Please let me know if it fits or updates are required.

Q	A
Branch?	main
Tickets	Closes #..., closes #...
License	MIT
Doc PR	api-platform/docs#...

[dunglas]

Good idea, but this will prevent the API from serving files with this extension if any.

We should use try_files to first check if the file exists API-side, and redirect to the PWA if it's not the case. This will have the added benefit of working with any file.