Fixed a bug where all the thumnails where the same as the first one in the firebase function

lib/src/resources/firebase_storage_provider.dart

@@ -34,7 +34,7 @@ class FirebaseStorageProvider {
         _storage.child('$folder$fileId.$type');
     return fileReference.putFile(
       file,
-      StorageMetadata(contentType: 'image'),
+      StorageMetadata(contentType: 'image/png'),
     );
   }
 

lib/src/screens/new_image_screen.dart

@@ -140,12 +140,14 @@ class _NewImageScreenState extends State<NewImageScreen> {
     Navigator.of(context).pop();
   }
 
+  // TODO: Pro users can save their pictures in full res.
   /// Prompts the user to take a picture.
   ///
   /// Updates the file in the bloc.
   Future<void> takePicture() async {
     final File imgFile = await ImagePicker.pickImage(
       source: ImageSource.camera,
+      maxWidth: 1500,
     );
     bloc.changePicture(imgFile);
   }