I've been taking a crack at uploading files onto S3 via NodeJS, but with a specific path where they have to be stored.

return s3fsImpl.writeFile(file_name.originalFilename,stream).then(function() {
     fs.unlink(file_name.path, function(err) {
         if (err) {
                console.error(err);
         } else {  /** sucessess **/  }

I'm not sure how do I give a path like /project_name/file_name. I have been following this tutorial