Base64 Image upload to Amazon S3

base64-s3.js

'use strict';
const aws = require('aws-sdk');

exports.s3PutBase64 = (image, folder, imageName) => {
      return new Promise(function(resolve, reject) {

        const buf = new Buffer(image.replace(/^data:image\/\w+;base64,/, ""), 'base64');
        const s3 = new aws.S3();

        aws.config = { 
              "accessKeyId": process.env.AWS_ACCESS_KEY_ID, 
              "secretAccessKey": process.env.AWS_SECRET_ACCESS_KEY 
        };

        s3.putObject({
            Bucket: process.env.AWS_S3_BUCKET,
            Key: folder + '/' + imageName,
            Body: buf,
            ACL: 'public-read',
            ContentType: "image/png",
            ContentEncoding: "base64"

        }, (error, data) => {
            if (error){
                reject(error);
            } else {
                resolve(data);
            }
        });
      });
    }