Expedited SSL, a Heroku 'add-on', offers SSL on a sub-domain as well as on the primary domain. It would be nice to hand all the configuration / maintenance off to them.
Our sub-domain is a Discourse.org instance hosted on Digital Ocean and maintained by the Discourse team. Since the Discourse team also offers SSL as an add-on, I'm looking for guidance (a) regarding feasibility. Would the Expedited SSL have access to our Docker instance / subdomain? (b) Will we also need to purchase an SSL certificate from Discourse. And (c) potential conflicts.
Alternatively, should I simply purchase Expedited SSL for the Heroku hosted primary domain and a Discourse team SSL certificate for the sub-domain. (And sort out the configuration myself.)