There is not much you need to do. If HTTPS is working on your server then Q2A will run just fine when loading the HTTPS URLs. You may wish to do two things:
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.