Add background images for hero images to assets

assets/images/backgrounds/nutritional_plans.txt.txt

@@ -0,0 +1,3 @@
+https://thenounproject.com/photo/tomatoes-chilies-and-dill-leaves-on-table-0JoGn5/
+
+Tomatoes, chilies and dill leaves on table by Jacob Lund from Noun Project

assets/images/backgrounds/workout_plans.txt.txt

@@ -0,0 +1,3 @@
+https://thenounproject.com/photo/athlete-working-out-with-battle-ropes-outdoors-on-grass-field-0LrJR4/
+
+Athlete working out with battle ropes outdoors on grass field by Jacob Lund from Noun Project

lib/screens/nutritional_plan_screen.dart

@@ -83,10 +83,8 @@ class NutritionalPlanScreen extends StatelessWidget {
               ],
               flexibleSpace: FlexibleSpaceBar(
                 title: Text(_nutritionalPlan.description),
-                background: Image.network(
-                  'https://thumbnails.production.thenounproject.com/NsyUiJkHgkfnnNt3bKw3DCtewXE=/fit-in/1000x1000/photos.production.thenounproject.com/photos/6905F43B-2816-4286-8696-5B7AEA8FE908.jpg',
-                  // --> https://thenounproject.com/photo/tomatoes-chilies-and-dill-leaves-on-table-0JoGn5/
-
+                background: Image(
+                  image: AssetImage('assets/images/backgrounds/nutritional_plans.jpg'),
                   fit: BoxFit.cover,
                 ),
               ),

lib/screens/workout_plan_screen.dart

@@ -131,10 +131,8 @@ class _WorkoutPlanScreenState extends State<WorkoutPlanScreen> {
               ],
               flexibleSpace: FlexibleSpaceBar(
                 title: Text(workoutPlan.description),
-                background: Image.network(
-                  'https://thumbnails.production.thenounproject.com/GS2Ct-A74O23cwQ-FYCpzlN9Bdc=/fit-in/1000x1000/photos.production.thenounproject.com/photos/1F45191D-AE0E-425D-90E3-95A23B762B95.jpg',
-                  // --> https://thenounproject.com/photo/athlete-working-out-with-battle-ropes-outdoors-on-grass-field-0LrJR4/
-
+                background: Image(
+                  image: AssetImage('assets/images/backgrounds/workout_plans.jpg'),
                   fit: BoxFit.cover,
                 ),
               ),

pubspec.yaml

@@ -75,9 +75,8 @@ flutter:
 
   # To add assets to your application, add an assets section, like this:
   assets:
-    - assets/images/logo.png
-    - assets/images/logo-white.png
-    - assets/images/placeholder.png
+    - assets/images/
+    - assets/images/backgrounds/
 
   # An image asset can refer to one or more resolution-specific "variants", see
   # https://flutter.dev/assets-and-images/#resolution-aware.