- Added `app.UseStaticFiles()` to serve static files from `wwwroot`.
- Changed root path redirection to `/health-ui`.
- Moved inline CSS/JS from `Program.cs` to `health-ui.css` and `health-ui.js`.
- Updated navigation links in the health check HTML.
- Enhanced Health UI with improved styles and animations.
- Introduced countdown auto-refresh in `health-ui.js`.
- Updated `launchSettings.json` to start at the root URL.
