Add links to memory management docs (#2329)

* added links to memory management docs

.added read free-content docs

* Update 100-memory-lifecycle.md

* Update content/roadmaps/106-javascript/content/116-javascript-memory-management/100-memory-lifecycle.md

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

content/roadmaps/106-javascript/content/116-javascript-memory-management/100-memory-lifecycle.md

@@ -7,3 +7,7 @@ Regardless of the programming language, the memory life cycle is pretty much alw
  - Release the allocated memory when it is not needed anymore
 
 The second part is explicit in all languages. The first and last parts are explicit in low-level languages but are mostly implicit in high-level languages like JavaScript.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://developer.mozilla.org/en-US/docs/Web/JavaScript/Memory_Management'>MDN docs - Memory Management</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://medium.com/swlh/the-lifecycle-of-memory-in-javascript-5b5bffc5ff4c'>Lifecycle in Memory Management</BadgeLink>