I have a website, let's say example.com (Apache, Ubuntu 16.04)
I've installed Letsencrypt and the site is accessible via HTTPS.
On the same server, I have Redash running and that is accessible via port 90. So, to access Redash, I go to example.com:90
The problem is that Redash is not accessible via HTTPS.
How to make port 90 accessible via HTTPS?