Update Infrastructure as Code (#1383)

* Update readme.md

* Update content/roadmaps/102-devops/content/105-infrastructure-as-code/readme.md

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

content/roadmaps/102-devops/content/105-infrastructure-as-code/readme.md

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-# Infrastructure as code
+# Infrastructure as Code
+
+Sometimes referred to as IaaC, this section refers to the techniques and tools used to define infrastructure, typically in a markup language like YAML or JSON. Infrastructure as code allows DevOps Engineers to use the same workflows used by software developers to version, roll back, and otherwise manage changes.  
+
+The term Infrastructure as Code encompasses everything from bootstrapping to configuration to orchestration, and it is considered a best practice in the industry to manage all infrastructure as code.  This technique precipitated the explosion in system complexity seen in modern DevOps organizations.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink badgeText='Watch' href='https://www.youtube.com/watch?v=zWw2wuiKd5o'>What is Infrastructure as Code?</BadgeLink>
+<BadgeLink badgeText='Watch' href='https://www.youtube.com/watch?v=POPP2WTJ8es'>What is Infrastructure as Code? Difference of Infrastructure as Code Tools</BadgeLink>