feat(readme): add Readme.md context

Author: kaczor6418

README.md

@@ -1 +1,23 @@
 # insertion-sort
+
+## Instalation
+After you clone this repo you need to move inside ```insertion-sort``` directory and rum command
+
+``` npm install```
+
+> To run this appliacion you need **node.js**
+
+## Description
+
+This method take two parametrs:
+
+ - **elementsList** -> it is the list which you want to sort
+ - **direction** -> it is optional parameter which you can set as ```ASC``` or ```DESC``` (ASC is default option)
+
+ > ASC (Ascending), DESC Descending)
+
+## How it works
+On this graphic you can see how **insertion-sort** algortihm works :
+<p align="center">
+  <img src="https://i.stack.imgur.com/hIlN4.png?raw=true" alt="InsertionSort"/>
+</p>