I am utilizing the letsencrypt feature of KeystoneJS to conveniently set up and manage HTTPS details for my project. I would like to configure this to function with a custom domain on Heroku. I have followed a previous guide to successfully configure the HTTPS, but when I load HTTPS on my site, it indicates that my certificate is only valid for *.herokuapps.com and not for my actual domain. Do I need to enable the Heroku SSL Beta addon to explicitly make HTTPS work with my domain? If so, how can I provide the required keys and certificates to the addon when my HTTPS information is generated server-side rather than locally? Is there a way to generate this information locally and then share it between Keystone and Heroku?
UPDATE: I have learned that I can manually pass a certificate and key to the SSL options in Keystone. However, I am unsure how I can automatically maintain these certificates unless I initialize them using the letsencrypt option in Keystone. I am still confused about creating the keys/certificates initially, and then relying on letsencrypt to update and communicate the new information with Heroku when necessary.