Add contribution guide

contributing/guide.md

@@ -1,2 +1,10 @@
 ## Submitting a Guide
 
+> This page is in progress.
+
+However, please follow the below steps:
+
+* Open an issue for the topic on you would want to write. 
+* Fork this repo
+* Create a new markdown file in the [guides directory](https://github.com/kamranahmedse/roadmap.sh/tree/master/storage/guides).
+* Open a pull request.