fixed issue #6

frontend/lib/main.dart

@@ -16,7 +16,9 @@ import 'pages/flashcards.dart';
 import 'pages/leaderboard.dart';
 //import 'pages/settings.dart';
 
-void main() {
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+  final isDark = await loadDarkMode();
   runApp(
     MultiProvider(
       providers: [
@@ -24,7 +26,7 @@ void main() {
           create: (_) => QuoteProvider()
         ),
         ChangeNotifierProvider(
-          create: (_) => ThemeProvider()
+          create: (_) => ThemeProvider(isDark: isDark)
         )
       ],
       child: HlaskovnikFrontendApp()