- Introduction on base view model and stateless widget classes

- Implementation of firebase
- Implementation of dependency injection

Took 11 hours 26 minutes

lib/services/NavigationService.dart

@@ -0,0 +1,21 @@
+import 'package:flutter/material.dart';
+
+class NavigationService {
+  GlobalKey<NavigatorState> _navigationKey = GlobalKey<NavigatorState>();
+
+  GlobalKey<NavigatorState> get navigationKey => _navigationKey;
+
+  void pop() {
+    return _navigationKey.currentState.pop();
+  }
+
+  Future<dynamic> navigateTo(String routeName, {dynamic arguments}) {
+    return _navigationKey.currentState
+        .pushNamed(routeName, arguments: arguments);
+  }
+
+  Future<dynamic> navigateToAndClearStack(String routeName, {dynamic arguments}) {
+    return _navigationKey.currentState
+        .pushNamedAndRemoveUntil(routeName, (r) => false, arguments: arguments);
+  }
+}