Custom Rancher Load Balancer haproxy.cfg to redirect any request under http to https and to redirect www. request to remove www.

haproxy.cfg

backend www-redirect
    http-request redirect prefix https://%[hdr(host),regsub(^www\.,,i)] code 302 if { hdr_beg(host) -i www. }
    
backend https-redirect
    http-request redirect scheme https code 302 if !{ ssl_fc }