Merge branch 'master' of https://github.com/bregman-arie/devops-exerc…

…ises

README.md

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 <details>
 <summary>What is the purpose of ReplicaSet?</summary><br><b>
+
+A ReplicaSet's purpose is to maintain a stable set of replica Pods running at any given time. As such, it is often used to guarantee the availability of a specified number of identical Pods.
 </b></details>
 
 <details>
 <summary>How a ReplicaSet works?</summary><br><b>
+
+A ReplicaSet is defined with fields, including a selector that specifies how to identify Pods it can acquire, a number of replicas indicating how many Pods it should be maintaining, and a pod template specifying the data of new Pods it should create to meet the number of replicas criteria. 
+
+A ReplicaSet then fulfills its purpose by creating and deleting Pods as needed to reach the desired number. When a ReplicaSet needs to create new Pods, it uses its Pod template.
 </b></details>
 
 <details>