Deploy demo apps to a free public cloud and document all links via a redirect (bit.ly)

[shinedeveloper]

1. Deploy demo apps and homeworks to Heroku, Google Cloud, Amazon AWS, Microsoft Azure or RedHat OpenShift so that students can look at them anytime. Zero maintenance effort required, must be free.

2. Put all links (to the deployed apps etc.) to the documentation via a redirect service (bit.ly, tiny.url, goo.gl etc.) to avoid hardwiring to any service.
   Note: Bit.ly is not a good candidate as the target URLs cannot be changed once set up. There are alternatives:
   https://thenextweb.com/apps/2012/06/02/not-a-fan-of-the-big-bitly-revamp-here-are-9-alternatives/
   https://www.quora.com/Is-it-possible-to-change-the-destination-of-a-bit-ly-link