❔ Serving SPA on ASP.NET Core MVC Web API

WebApplication app = builder.Build();
app.UseCors(options => {
    options.AllowAnyOrigin();
    options.AllowAnyHeader();
    options.AllowAnyMethod();
});
app.UseStaticFiles();

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

// Configure the HTTP request pipeline.
app.UseSwagger();
app.UseSwaggerUI();

app.MapHub<DevicesHub>("api/hubs/devices");
app.MapControllers();
app.UseSpa(spa => {
    spa.Options.SourcePath = Path.Join(app.Environment.ContentRootPath, "client");
});
app.MapFallbackToController("Index", "Fallback");

public class Fallback: ControllerBase
{
    public IActionResult Index()
    {
        return File("~/client/index.html", "text/html");
    }
}

FileNotFoundException: Could not find file 'ProjectDirectory\bin\Debug\net7.0\client'.