Hello api

1. Basic Requirement 
• node.js
2. steps to make simple api
   
• crate a new folder 
• open that folder in vs code
• Open the new terminal
  
• Run the command 
• npm init && npm i && npm i express && npm i mongodb && npm i mongoose && npm i nodemon --save-dev
• write the nessesory things like package name and press enter , enter till  auther name apperes , enter auther name and press enter again 
• 
  
• open package.json file and write search for 
  
•   "scripts": {
      "test": "echo \"Error: no test specified\" && exit 1"
    },
• and replace it with 
    "scripts": {

      "test": "echo \"Error: no test specified\" && exit 1",

      "start":"nodemon index.js"

    }

• Now create a new file index.js and write the following code 
• const express = require('express');

  const app = express();

  
  

  console.log("Hello World ");

  
  

  const port = process.env.PORT || 3000;

  app.listen(port, () => {

    console.log(`Server listening on port ${port}`);

  });

  
  
• Now open the new terminal and run the command npm start
• You will see the following output