Fixes: https://github.com/jitsi/docker-jitsi-meet/issues/43

Fixes: https://github.com/jitsi/docker-jitsi-meet/issues/30

The entry is covered by the more generic next one.

Useful if you're running this setup directly on the Internet, with a
Let's Encrypt certificate.

If TLS is terminated elsewhere and then connections are proxied over
HTTP, there is no need for it and it makes initialization a tad slower
on the first run.

Resources:

- https://hynek.me/articles/hardening-your-web-servers-ssl-ciphers/
- https://weakdh.org/sysadmin.html

It's now already there since it's in base.