Add resource for flutter (#2977)

content/roadmaps/100-frontend/content/121-mobile-applications/102-flutter.md

@@ -24,3 +24,4 @@ If you know a bit of programming, Dart is a typed object programming language. Y
 <BadgeLink colorScheme='green' badgeText='Course' href='https://www.youtube.com/watch?v=1ukSR1GRtMU&list=PL4cUxeGkcC9jLYyp2Aoh6hcWuxFDX6PBJ'>Flutter Tutorial for Beginners</BadgeLink>
 <BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.w3adda.com/flutter-tutorial'>Flutter Tutorial</BadgeLink>
 <BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.tutorialspoint.com/dart_programming/index.htm'>Learn Dart Programming</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://thenewstack.io/12-ways-flutter-streamlines-app-development/'>12 Ways Flutter Streamlines App Development</BadgeLink>