Added common modules to node.js (#2579)

DNS , events , child_processes , REPL , readline , util , querystring , string_decoder , tls

content/roadmaps/107-nodejs/content/117-nodejs-common-modules/100-builtin-modules.md

@@ -16,6 +16,15 @@ Built-in modules are already installed with `Node.js`, so you don't need to inst
 - **perf_hooks**: provides APIs for performance measurement
 - **crypto**: to handle OpenSSL cryptographic functions.
 - **Buffer**: provides APIs to handling streams of binary data.
+- **DNS**: enables name resolution.
+- **events**: for handling existing events and creating custon events.
+- **child_processes**: provides the ability to spawn subprocesses.
+- **REPL**: provides a Read-Eval-Print-Loop (REPL) implementation that is available both as a standalone program or includible in other applications.
+- **readline**: provides an interface for reading data from a Readable stream one line at a time.
+- **util**:  supports the needs of Node.js internal APIs. 
+- **querystring**: provides utilities for parsing and formatting URL query strings.
+- **string_decoder**: provides an API for decoding Buffer objects into strings.
+- **tls**: provides an implementation of the Transport Layer Security (TLS) and Secure Socket Layer (SSL) protocols.
 
 <ResourceGroupTitle>Free Content</ResourceGroupTitle>
 <BadgeLink colorScheme='blue' badgeText='Official Website' href='https://nodejs.org/api/modules.html'>API documentation of Built-in modules</BadgeLink>