I have a node app running successfully on Heroku. I have purchased an Expedited SSL certificate and it all works fine. I go to https... and get a full \'green bar\' proving
As of July 2019, Heroku supports HTTPS redirects to OTHER DOMAINS OR SUBDOMAINS (a redirect cannot point to itself). All you have to do is configure a URL record for your domain as outlined in this post. The full announcement can be found here.