how to upload file to s3 nodejs

1const fs = require('fs');
2const AWS = require('aws-sdk');
3
4const s3 = new AWS.S3({
5    accessKeyId: process.env.AWS_ACCESS_KEY,
6    secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY
7});
8
9const fileName = 'contacts.csv';
10
11const uploadFile = () => {
12  fs.readFile(fileName, (err, data) => {
13     if (err) throw err;
14     const params = {
15         Bucket: 'testBucket', // pass your bucket name
16         Key: 'contacts.csv', // file will be saved as testBucket/contacts.csv
17         Body: JSON.stringify(data, null, 2)
18     };
19     s3.upload(params, function(s3Err, data) {
20         if (s3Err) throw s3Err
21         console.log(`File uploaded successfully at ${data.Location}`)
22     });
23  });
24};
25
26uploadFile();
27
28