Register client, userId, imageService in DIContainer on login

Sources/Luminate/Luminate.swift

@@ -23,6 +23,9 @@ struct Luminate: App {
                 )
             } else {
                 ServerSetupView { client, id in
+                    DIContainer.shared.register(\.client, value: client)
+                    DIContainer.shared.register(\.userId, value: id)
+                    DIContainer.shared.register(\.imageService, value: ImageService())
                     self.client = client
                     self.userId = id
                 }

Sources/LuminateCore/DIContainer.swift

@@ -1,6 +1,5 @@
 import Foundation
 
-@MainActor
 public final class DIContainer {
 
     public static let shared = DIContainer()