- https://www.sitepoint.com/javascript-command-line-interface-cli-node-js/
- https://timber.io/blog/creating-a-real-world-cli-app-with-node/
- https://developer.okta.com/blog/2019/06/18/command-line-app-with-nodejs
- https://pdf-lib.js.org/docs/api/classes/pdfdocument
- https://github.com/Hopding/pdf-lib
- https://github.com/Hopding/pdf-lib#copy-pages