Elementum Challenge Solution
During the NodeConfAR 2017, Elementum throw a challenge. If you'd solved it, you'd be participating on a raffle for a drone. To start you have to go to: https://nodeconf.elementum.com/
If you accepted the challenge, you'd get an email with instructions that you have to follow. If you're persistent enough, you'd get here:
For the time you're reading this is probable that Elementum already took down the server to play with the challenge, but you can follow the different code steps I had to follow to complete the challenge: