User Story: I can pass a URL as a parameter and I will receive a shortened URL in the JSON response.
User Story: If I pass an invalid URL that doesn't follow the valid http://www.example.com format, the JSON response will contain an error instead.
User Story: When I visit that shortened URL, it will redirect me to my original link.
Example creation usage:
https://necessary-gas.glitch.me/add/https://www.google.com
https://necessary-gas.glitch.me/add/http://foo.com:80
Example creation output
{ _id: "59aa6814fa65f637ce573faf", shortCode: "zfjri", url: "http://www.google.com", shortenedCount: 5, redirectCount: 1 }
Usage:
https://necessary-gas.glitch.me/zfjri
Will redirect to: https://www.google.com/