(Docs) 113-nmap: Adding a content (#1882)

* docs(113-nmap): adding a content

* Update content/roadmaps/102-devops/content/102-managing-servers/101-live-in-terminal/113-nmap.md

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

content/roadmaps/102-devops/content/102-managing-servers/101-live-in-terminal/113-nmap.md

@@ -1 +1,7 @@
-# Nmap
+# NMAP
+
+NMAP stands for Network Mapper and is an open-source tool used to explore and audit the network's security, such as checking firewalls and scanning ports.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='blue' badgeText='Official Page' href='https://nmap.org/book/man.html'>NMAP Official Manual Book</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.freecodecamp.org/news/what-is-nmap-and-how-to-use-it-a-tutorial-for-the-greatest-scanning-tool-of-all-time/'>What is Nmap and How to Use it</BadgeLink>