Compositing is the method of combining two or more images to make a single picture. Compositing can be used to put watermarks on paid images so that they can't be used for free.
Clone the repo and navigate to directory. Install dependencies.
$ npm install
Start the server.
$ npm start
After starting, navigate to http://localhost:5000/watermark/:filename
eg: http://localhost:5000/watermark/post.png
