Fixed: Installer hangs during service removal

Fixes #2223

src/NzbDrone.Host/Bootstrap.cs

@@ -14,6 +14,7 @@ using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Hosting.WindowsServices;
 using NLog;
+using Npgsql;
 using NzbDrone.Common.Composition.Extensions;
 using NzbDrone.Common.Disk;
 using NzbDrone.Common.EnvironmentInfo;
@@ -55,6 +56,7 @@ namespace NzbDrone.Host
                 Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
 
                 var appMode = GetApplicationMode(startupContext);
+                var config = GetConfiguration(startupContext);
 
                 switch (appMode)
                 {
@@ -83,12 +85,22 @@ namespace NzbDrone.Host
                     // Utility mode
                     default:
                     {
-                        new Container(rules => rules.WithNzbDroneRules())
-                            .AutoAddServices(ASSEMBLIES)
+                        new HostBuilder()
+                            .UseServiceProviderFactory(new DryIocServiceProviderFactory(new Container(rules => rules.WithNzbDroneRules())))
+                            .ConfigureContainer<IContainer>(c =>
+                            {
+                                c.AutoAddServices(Bootstrap.ASSEMBLIES)
                                     .AddNzbDroneLogger()
+                                    .AddDatabase()
                                     .AddStartupContext(startupContext)
                                     .Resolve<UtilityModeRouter>()
                                     .Route(appMode);
+                            })
+                            .ConfigureServices(services =>
+                            {
+                                services.Configure<PostgresOptions>(config.GetSection("Readarr:Postgres"));
+                            }).Build();
+
                         break;
                     }
                 }
@@ -111,6 +123,7 @@ namespace NzbDrone.Host
             GC.Collect();
             GC.WaitForPendingFinalizers();
             SQLiteConnection.ClearAllPools();
+            NpgsqlConnection.ClearAllPools();
         }
 
         public static IHostBuilder CreateConsoleHostBuilder(string[] args, StartupContext context)