SSL setup with multiple servers

Hi all,
I am new to this ssl stuff and would like to secure my Home Assistant. I have my own webpage setup on an Ubuntu 20.04 server running Apache2. I access my webpage at https://mywebsite.com and it is secure. I have Hassio running in a Docker container on the same server which has a different IP address. I access Home Assistant by https://mywebsite.com:port which the router forwards to the correct internal IP but it is not secure. To setup SSL on Home Assistant I need port 80 which is used by my web server. Is there any way to secure hassio is this situation?

TIA,
Scott