I have a Heroku app that I would like to access via a subdomain of a client's Yahoo hosted domain through https (SSL). I have set up the subdomain on the Yahoo side via a DNS CNAME entry and the forwarding works fine to the Heroku app -- albeit with a certificate warning.
Question: do I have to purchase the SLL certificate for the subdomain to be installed on Heroku from Yahoo?
Update: Here are the SSL Endpoint instructions on Heroku: https://devcenter.heroku.com/articles/ssl-endpoint.