added submodule command

Author: LucazzP

README.md

@@ -37,3 +37,6 @@ const like = 'sample';
 TODO: Tell users more about the package: where to find more information, how to 
 contribute to the package, how to file issues, what response they can expect 
 from the package authors, and more.
+
+
+`git submodule update --init`