added provider in main.dart

lib/main.dart

@@ -1,10 +1,21 @@
 import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
 
 import 'pages/create_recipe_page.dart';
 import 'pages/overview_page.dart';
+import 'services/providers/recipe_provider.dart';
 
 void main() {
-  runApp(const RecipeJournal());
+  runApp(
+    MultiProvider(
+      providers: [
+        ChangeNotifierProvider(
+          create: (context) => RecipeProvider(),
+        ),
+      ],
+      child: const RecipeJournal(),
+    ),
+  );
 }
 
 class RecipeJournal extends StatelessWidget {