nodejs modules (#2118)

* Node.js Introduction updated

...developer-roadmap/content/roadmaps/107-nodejs/content/100-nodejs-introduction/readme.md file updated with the appropriate guidelines.

* 101-nodejs-modules.md file updated

* Update content/roadmaps/107-nodejs/content/100-nodejs-introduction/readme.md

* Update content/roadmaps/107-nodejs/content/101-nodejs-modules/readme.md

* Update content/roadmaps/107-nodejs/content/101-nodejs-modules/readme.md

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

content/roadmaps/107-nodejs/content/100-nodejs-introduction/readme.md

@@ -1,6 +1,6 @@
-# Nodejs introduction
+# Node.js Introduction
 
-Node.js® is an open source, cross-platform runtime environment and library that is used for running web applications outside the client’s browser.
+Node.js is an open source, cross-platform runtime environment and library that is used for running web applications outside the client’s browser.
 
 It is used for server-side programming, and primarily deployed for non-blocking, event-driven servers, such as traditional web sites and back-end API services, but was originally designed with real-time, push-based architectures in mind. Every browser has its own version of a JS engine, and node.js is built on Google Chrome’s V8 JavaScript engine.
 

content/roadmaps/107-nodejs/content/101-nodejs-modules/readme.md

@@ -1 +1,7 @@
-# Nodejs modules
+# Node.js Modules
+
+CommonJS modules are the original way to package JavaScript code for Node.js. Node.js also supports the ECMAScript modules standard used by browsers and other JavaScript runtimes, they are the official standard format to package JavaScript code for reuse.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='blue' badgeText='Official Docs' href='https://nodejs.org/api/modules.html#modules-commonjs-modules'>Modules: CommonJS modules</BadgeLink>
+href='https://blog.logrocket.com/commonjs-vs-es-modules-node-js/'>CommonJS vs. ES modules in Node.js</BadgeLink>