security: Redirect all HTTP requests to HTTPS

Improve kimchi security by redirecting all HTTP requests to HTTPS that
way we make sure all information will be send in a secure way to and
from the server.

Also add Strict-Transport-Security header to avoid SSL stripping
(https://en.wikipedia.org/wiki/SSL_stripping#SSL_stripping)

Signed-off-by: Aline Manera <alinefm@br.ibm.com>