Add content for command line applications (#2900)

* node.js command line apps readme added

* Update content/roadmaps/107-nodejs/content/106-nodejs-command-line-apps/readme.md

Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

content/roadmaps/107-nodejs/content/106-nodejs-command-line-apps/readme.md

@@ -1 +1,8 @@
-# Nodejs command line apps
+# Command Line Applications
+
+Command Line Applications are applications that can be run from the command line. They are also called CLI (Command Line Interface) applications. Users can interact with clients entirely by terminal commands. They are very useful for automation and building tools.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://learn.co/lessons/intro-to-cli-applications'>Intro To CLI Applications</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://developer.okta.com/blog/2019/06/18/command-line-app-with-nodejs'>Build a Command Line Application with Node.js</BadgeLink>
+<BadgeLink colorScheme='red' badgeText='Watch' href='https://www.youtube.com/watch?v=_oHByo8tiEY'> 5-Minute Node.js CLI Project</BadgeLink>