- difficulty ratings changed from 1-3 to a 1-5 scale
- challenge difficulty adjusted based on user feedback
- sign-up with Google account using OAuth 2.0 now possible
- clarified some challenge descriptions
- added new challenges
- added Node.js 7.x to supported runtimes
- added Docker images and ZIP/TGZ-packaged distributions for Node.js 7.x
In case you do not see the new Log in with Google button on the
#/loginscreen, you run the application on an unrecognized hostname. This has no impact on the possibility to solve 100% of the challenges!