Make image to base64 dataUri in NodeJS

Images are already in server, may be uploaded by multer. now have to make dataUri for s3.

var fs = require('fs');

var uploadPath = 'upload/';
var image = 'blahblah.jpg';

fs.readFile(uploadPath+image, 'base64', function(err, data){
        if (err) throw err;
        var type = image.split('.')[1];
        //here is the dataUri
        var dataUri = 'data:image/'+type+';base64,'+data;
        console.log(dataUri);
});