Add cookie based authentication content

* Update 100-cookie-based.md

* Update content/roadmaps/101-backend/content/109-apis/106-authentication/100-cookie-based.md

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

content/roadmaps/101-backend/content/109-apis/106-authentication/100-cookie-based.md

@@ -1 +1,7 @@
-# Cookie based
+# Cookie-Based Authentication
+
+Cookies are pieces of data used to identify the user and their preferences. The browser returns the cookie to the server every time the page is requested. Specific cookies like HTTP cookies are used to perform cookie-based authentication to maintain the session for each user.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://stackoverflow.com/questions/17769011/how-does-cookie-based-authentication-work'>How does cookie based authentication work?</BadgeLink>
+