Giraffe F#

open System
open Microsoft.AspNetCore.Builder
open Microsoft.Extensions.DependencyInjection
open Giraffe

let gif = Convert.FromBase64String "R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw=="

let pixel: HttpHandler =
    setHttpHeader "Content-Type" "image/gif"
    >=> setHttpHeader "Cache-Control" "no-store"
    >=> setBody gif

let webApp =
    choose [
        GET >=> route "/pixel.gif" >=> pixel
        RequestErrors.NOT_FOUND "Not Found"
    ]

let builder = WebApplication.CreateBuilder()
builder.Services.AddGiraffe() |> ignore

let app = builder.Build()
app.UseGiraffe webApp
app.Run "http://0.0.0.0:8080"