Add meme-adding logic

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

src/components/hideableHeader.tsx

@@ -10,7 +10,7 @@ const hideableHeaderStyles = StyleSheet.create({
     top: 0,
     left: 0,
     right: 0,
-    zIndex: 100,
+    zIndex: 1,
   },
 });