content for Udacity's cloud developer nanodegree.
https://github.com/junjie-w/cloud-developer/tree/master/course-02/project/image-filter-starter-code
A link to the endpoint URL for the running elastic beanstalk deployment: http://udagramimagefilterjunjie-env.eba-5h9qmp7x.us-east-1.elasticbeanstalk.com/
filter an example image: http://udagramimagefilterjunjie-env.eba-5h9qmp7x.us-east-1.elasticbeanstalk.com/filteredimage?image_url=https://interactive-examples.mdn.mozilla.net/media/cc0-images/grapefruit-slice-332-332.jpg