Updated REadme.md with basic info

README.md

@@ -1,5 +1,16 @@
 # openapi-validation-tools
 Tools for validating OpenAPI (Swagger) files.
 
+### Requirements
+- node version > 4.x
+
+
+### How to run the tool 
+
+Clone the repo and then execute following steps from your terminal/cmd prompt
+```
+npm install
+node index.js
+```
 ---
 This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/). For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or contact [opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional questions or comments.