Tiny HTTP Redirect

Program .cs

using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Routing;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;
using System.Threading.Tasks;

var config = new ConfigurationBuilder().AddJsonFile("appsettings.json", optional: false, reloadOnChange: false).Build();
WebHost.CreateDefaultBuilder().Configure(app => {
    app.UseRouting().UseEndpoints(endpoints =>
        {
            endpoints.MapGet("/", context => context.Response.WriteAsync("Hello"));
            foreach (var r in config.GetSection("Aliases").GetChildren())
                endpoints.MapGet("/" + r.Key, context => Task.Run(() => context.Response.Redirect(r.Value)));
        });
}).Build().Run();

/* appsettings.json:

  "Aliases": {
    "foo": "https://www.google.com/",
    "bar": "https://www.microsoft.com/",
    "www": "https://www.wodongatafe.edu.au"
  }
*/