Update snippet 'Minimal AspNetCore web server'

Title

Description

Source code

(* creates a web server in F# script *)

#I @"C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App\5.0.4"
#r "Microsoft.AspNetCore"
#r "Microsoft.AspNetCore.Routing"
#r "Microsoft.AspNetCore.Http.Abstractions"
#r "Microsoft.AspNetCore.Hosting"
#r "Microsoft.AspNetCore.Diagnostics"
#r "Microsoft.AspNetCore.Hosting.Abstractions"
#r "Microsoft.Extensions.DependencyInjection.Abstractions"
#r "Microsoft.Extensions.Hosting"
#r "Microsoft.Extensions.Hosting.Abstractions"

open Microsoft.AspNetCore.Builder
open Microsoft.AspNetCore.Hosting
open Microsoft.Extensions.Hosting
open Microsoft.Extensions.DependencyInjection
open Microsoft.AspNetCore.Http

type Startup() =

member _.ConfigureServices(services: IServiceCollection) = ()

member _.Configure(app: IApplicationBuilder, env: IHostEnvironment) =
        if env.IsDevelopment() then
            app.UseDeveloperExceptionPage() |> ignore

app
            .UseRouting()
            .UseEndpoints(fun endpoints ->
                endpoints.MapGet("/", (fun context -> context.Response.WriteAsync("Hello World!")))
                |> ignore)
        |> ignore

let createHostBuilder (args: string []) =
    Host
        .CreateDefaultBuilder(args)
        .ConfigureWebHostDefaults(fun webBuilder -> webBuilder.UseStartup<Startup>() |> ignore)

let main args = createHostBuilder(args).Build().Run()

main [||]