https://devcenter.heroku.com/articles/s3 https://devcenter.heroku.com/articles/s3-upload-node https://github.com/danialfarid/ng-file-upload
https://devcenter.heroku.com/articles/s3 https://devcenter.heroku.com/articles/s3-upload-node https://github.com/danialfarid/ng-file-upload