Exercise 1: This code will deploy an add-in (or an app) that will allow you to create a page in a SharePoint with a document library and columns.
P.S. I intentionally added a vintage Apple logo for this SharePoint app. Microsoft vs Apple = BFF!
Important: Access to the source code is restricted for privacy reasons. If you are a prospective employer and would like to see my source code, please contact me for more information.