Hi Yuuki,
For me it's still unclear why you want HTTPS to your localhost.
Running the Mendix runtime locally doesn't support SSL functionality between browser (client) and runtime (server) out of the box.
The certificates documentation is a whole other domain, where the Mendix runtime consumes a REST-service (or webservice) as client from another server on the internet. Then there are possibilities to configure custom authorities or use a client certificate. This is a different kind of certificate than https-certificates.
Hope this helps a bit!
Johan
Thank you for answering.
I understand that TLS cannot be enabled locally.
I'm going to deploy to Mendix Cloud and see how HTTP/2 works.