I spent almost a week searching on this issue and need your help.
I’m hosting my app on Heroku and for each user we generate a subdomain (e.g. example.myApp.com) and we need to let him to point his own domain name (example.com) to example.myApp.com and then generate a SSL cert for them.
Now the issue is that Heroku doesn’t allow us to have multiple SSL certificate on the same domain. Is it possible to auto-update (with the new domains) a single cert using Let’s Encrypt? If yes, is there any limit?
Moving from Heroku to different hosting server could be also a solution, but I don’t know if the issue will be the same on another one.
I’m sure someone already had this issue in this community and I would really appreciate any help!