Update README.md

Author: shadowdevcode

README.md

@@ -2,6 +2,14 @@
 
 Hi! This is the source code for my [portfolio website](https://vijaysehgal.com), which I've using React and Gatsby.
 
+## Usage:
+1. Install nodejs from [here](https://nodejs.org/en/download/)
+2. Check whether installed or not using : 
+`node --version` &
+`npm --version`
+3. Create a production build using `gatsby build`
+4. Create a production site locally using `gatsby serve`
+
 ## Technologies Used
 
 - [Gatsby](https://gatsbyjs.org/) - static site generator
@@ -17,4 +25,4 @@ Hi! This is the source code for my [portfolio website](https://vijaysehgal.com),
 
 ## Feel free to ask questions if any
 
-### Feel from to fork it. 
+### Feel free to fork it.