To run the backend:

1. Clone the repo
2. Run in terminal : npm install
3. To successfully run the server, you have to create a sptify developer account in spotify and login. Then you hae to create an app there. Then you will get a clientId and clientSecret which you will use in spotify.js file to authenticate spotify api request.
4. Run : npm start
5. To test the api, create a post request in Postman : "localhost:5000/getSong". In the body, send a form data having a key called 'image' and a value which is the image you want to analyze.