Serve SPA (React) in ASP.NET web API

...

var app = builder.Build();

// Configure the HTTP request pipeline.

app.UseSwagger();
app.UseSwaggerUI();

using (var scope = app.Services.CreateScope())
{
    DbInitializer.Seed(scope).Wait();
}

app.UseHttpsRedirection();


app.UseExceptionHandler();

app.UseAuthentication();
app.UseAuthorization();

app.MapControllers();

app.UseDefaultFiles();
app.UseStaticFiles();
app.MapFallbackToFile("index.html");

app.Run();