ASP.NET Core MVC controller C#

using Microsoft.AspNetCore.Mvc;

var builder = WebApplication.CreateBuilder(args);
builder.Services.AddControllers();

var app = builder.Build();
app.MapControllers();
app.Run("http://0.0.0.0:8080");

[ApiController]
public class PixelController : ControllerBase
{
    private static readonly byte[] Gif = Convert.FromBase64String("R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==");

    [HttpGet("/pixel.gif")]
    [ResponseCache(NoStore = true)]
    public IActionResult Get() => File(Gif, "image/gif");
}