API Basejump: URL Shortener Microservice

###Objective: Build a full stack JavaScript app that is functionally similar to this: reference case and deploy it to Heroku. ###User story:

1. user can
   pass a URL as a parameter and than
   receive a shortened URL in the JSON response.
2. If user pass an invalid URL
   that doesn't follow the valid http://www.example.com format,
   the JSON response will contain
   an error instead.
3. When user visit that shortened URL,
   it will redirect to the original link.

Live demo:

• https://api-url-shortener-microservice.herokuapp.com/

###Usage example:

• creating short link from valid URL: input: https://api-url-shortener-microservice.herokuapp.com/new/http://freecodecamp.com/news output: { "original_url": "http://freecodecamp.com/news", "short_url": "https://api-url-shortener-microservice.herokuapp.com/4" }
• using created short link: input: https://api-url-shortener-microservice.herokuapp.com/cnn output: redirect to http://freecodecamp.com/news
• creating short link from invalid (or non existed) URL: input: https://api-url-shortener-microservice.herokuapp.com/new/invalid_URL/?allow=true output: { "original_url": "invalid_URL/", "short_url": "https://api-url-shortener-microservice.herokuapp.com/eRR" }