Following along with the session, I have a Server which compiles and builds but won't run, has no target. What should the Run Target be?

Is there anyway to set/define the colour of the navgationTitle? Have tried 'tint', Text("some title").foregroundColor(.red). Example .navigationTitle(Text("Developer Journal").foregroundColor(Color.white)) Can't seem to influence the Text Color, the old way used to be to use UINavigation and bring that into SwiftUI setting the 'appearance' but figured this would be updated in this release.

What is the best way to incorporate Core Data into the new App Structure? For example, I have waged to get it working using the following, but is this the best way to do this? import SwiftUI import CoreData @main struct SessionsApp: App {     @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate     var body: some Scene {         WindowGroup {             let context = appDelegate.persistentContainer.viewContext             ContentView()                 .environment(\.managedObjectContext, context)         }     } } Then In AppDelegate the code is like this import UIKit import CoreData class AppDelegate: NSObject, UIApplicationDelegate {     func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {         print("UIApplication, didFinishLaunchingWithOptions")         return true     }     // MARK: - Core Data stack     lazy var persistentContainer: NSPersistentContainer = {         let container = NSPersistentContainer(name: "Sessions")         container.loadPersistentStores(completionHandler: { (storeDescription, error) in             if let error = error as NSError? {                 fatalError("Unresolved error \(error), \(error.userInfo)")             }         })         return container     }()     // MARK: - Core Data Saving support     func saveContext () {         let context = persistentContainer.viewContext         if context.hasChanges {             do {                 try context.save()             } catch {                 let nserror = error as NSError                 fatalError("Unresolved error \(nserror), \(nserror.userInfo)")             }         }     } } Finally and lastly it is used in this View, which fails to dynamically preview but still works... import SwiftUI import CoreData struct ContentView: View {     @Environment(\.managedObjectContext) private var context     @FetchRequest(entity: Session.entity(), sortDescriptors: []) private var sessions: FetchedResults<Session>     @State private var showingAddScreen:Bool = false     var body: some View {         NavigationView {             List {                 ForEach(sessions, id:\.id) {session in                     Text("\(session.name ?? "unknown")")                 }             }             .navigationTitle("Sessions")             .navigationBarItems(trailing: Button("Add", action: {                 self.showingAddScreen.toggle()             }))         }         .sheet(isPresented: $showingAddScreen, onDismiss: {self.showingAddScreen.toggle()}) {             SessionFormView()         }     } } struct ContentView_Previews: PreviewProvider {     static let coreDataHelper = CoreDataHelper()     static let context = coreDataHelper.persistentContainer.viewContext     static var previews: some View {         ContentView().environment(\.managedObjectContext, context)     } } Advice ? Please let me know if there is a much better way... cheers don