accessing rocketchat via https

Hi together,

i have recently installed the chat application rocketchat on my plesk linux server (ubuntu 18.04) just by the installation guide in this link. I'm also able to access the application in the browser with http on port 3000 but it is not working for https. So my question is what apache configuration do i have to make to get the application working on https.

I'm only using apache webserver. I'm using...

accessing rocketchat via https