how do I make a new database from CloudKit dashboard?

the following code loads fine, the text and the double field both show 300. however when I click submit the text only changes to 0. you will see in the print output that the init was called with the new value of 0 but it does not update the double field? any suggestions?import SwiftUI struct ContentView: View { @State var amount:Double = 300 var body: some View { VStack { Text("\(self.amount)") DoubleField(value: $amount) Button(action: {self.amount=0}) {Text("Submit")} } .padding() .frame(maxWidth: .infinity, maxHeight: .infinity) } } struct DoubleField:View { @Binding var doubleValue:Double @State var stringValue:String init(value: Binding) { print("DoubleField.init(value: \(value.wrappedValue))") self._doubleValue = value self._stringValue = State(initialValue: "\(value.wrappedValue)") } var body: some View { TextField("0.00", text: $stringValue) } }