horizon tries to resolve to http when using ssl terminating in Haproxy

Issue

• How to change horizon to https ? horizon is not https enabled
• "Following the article looks like all the OpenStack services endpoints is working with SSL terminating in HaProxy,
  Horizon insist on a redirect after the login to a non https link that is causing an error. Horizon works if you manually force HTTPS in browser address bar.

frontend vip-horizon-https-pub
    bind 192.168.0.1:443 ssl crt /etc/pki/haproxy/cert.pem
    timeout client 180s
    cookie SERVERID insert indirect nocache

    default_backend horizon

frontend vip-horizon-int
    bind 192.168.0.1:80
    timeout client 180s
    cookie SERVERID insert indirect nocache
    default_backend horizon

backend horizon
    balance roundrobin
    timeout server 180s
    server controller-01 192.168.0.50:80 check inter 1s cookie controller-01
    server controller-02 192.168.0.51:80 check inter 1s cookie controller-02
    server controller-03 192.168.0.52:80 check inter 1s cookie controller-03