Add project files.

BlazorDeviceTestRig/Program.cs

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+using System;
+using System.Net.Http;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using System.Text;
+using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
+using BlazorDeviceInterop.Geolocation;
+
+namespace BlazorDeviceTestRig
+{
+    public class Program
+    {
+        public static async Task Main(string[] args)
+        {
+            var builder = WebAssemblyHostBuilder.CreateDefault(args);
+            builder.RootComponents.Add<App>("app");
+            
+            builder.Services.AddScoped<IGeolocationService, GeolocationService>();
+
+            builder.Services.AddScoped(sp => new HttpClient { BaseAddress = new Uri(builder.HostEnvironment.BaseAddress) });
+
+            await builder.Build().RunAsync();
+        }
+    }
+}