I confirm, google complains.
NET::ERR_CERT_COMMON_NAME_INVALID
Subject: *.herokuapp.com
Issuer: DigiCert SHA2 High Assurance Server CA
Expires on: 19 mai 2017
Current date: 2 avr. 2015heroku charges $20 a month to allow a SSL certificate for a custom domain!
Re:Ruby Koans
by nateberkopec on Thursday April 02, 2015 @10:22AM
(#9310840)
Just use Cloudflare. It's free.
Re:Ruby Koans
by psychometry on Thursday April 02, 2015 @12:15PM
(#9311621)
Details: https://robots.thoughtbot.com/set-up-cloudflare-free-ssl-on-...
There are some downsides to this approach that are described there.
https://koans.heroku.com/
edit:
this works though:
https://koans.herokuapp.com/en