fix: Client-side routing breaks on page refresh for non-root paths. in s3-proxy-server

[akram6t]

Current Behavior

• Direct navigation to routes (e.g., /projects, /about) works when clicking links.
• Refreshing the page on any non-root path (e.g., /projects, /about) returns an S3 NoSuchKey error.
• Static assets load correctly.
• Root path (/) works as expected.

Expected Behavior

• All client-side routes should work on direct access and page refresh.
• S3 should serve index.html for all non-static routes.
• SPA routing capabilities should be maintained.

Build Project details

• Framework: React/Vite SPA
• Current implementation fails to handle client-side routing properly.