Adding Observables class

DHBW-Service/Views/Tabs/HomeView.swift

@@ -8,13 +8,23 @@
 import SwiftUI
 
 struct HomeView: View {
+    @EnvironmentObject var settings: LocalSettings
+    
     var body: some View {
-        Text(/*@START_MENU_TOKEN@*/"Hello, World!"/*@END_MENU_TOKEN@*/)
+        VStack {
+            Button(action: {
+                self.settings.isFirstOpening = !self.settings.isFirstOpening
+            }){
+                Text("First opening toggle")
+            }
+            Text("Test")
+        }
     }
 }
 
 struct HomeView_Previews: PreviewProvider {
     static var previews: some View {
         HomeView()
+            .preferredColorScheme(.dark)
     }
 }