Update README.md

README.md

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-# saral_API
-saral like api
+## Saral-Requests-API
+SARAL is the eLearning platform of NavGurukul, which is available on website http://saral.navgurukul.org. I have created a CLI based app where users can access the content of saral using the terminal.
+
+Here I implemented a basic version of an eLearning API, using express framework of Node JS. The users can manage and create different courses, exercises and also manage submissions, using basic CRUD operations.
+
+Express is a minimal and flexible Node.js web application framework that provides a robust set of features for web and mobile applications.
+
+To install express, run the following command on your terminal in Linux.
+
+### sudo apt-get install npm
+### npm install express --save
+To run your code, first open your server port using node file_name.js in your working directory in terminal. And, then you can apply the basic CRUD operations.