Updates HAproxy configuration - fix #4

dockerfiles/load-balancer/confd/confd/templates/haproxy.cfg.tmpl

@@ -2,6 +2,8 @@ global
   maxconn 4096
   user haproxy
   group haproxy
+  tune.ssl.default-dh-param 2048
+  ssl-default-bind-ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA
 
 defaults
   mode http
@@ -16,7 +18,9 @@ defaults
 
 frontend https-in
 mode http
-  bind *:443 ssl crt-list /etc/haproxy/crt-list crt /etc/haproxy/approved-certs/default.pem
+  bind *:443 ssl no-sslv3 crt-list /etc/haproxy/crt-list crt /etc/haproxy/approved-certs/default.pem
+  # HSTS (15768000 seconds = 6 months)
+  rspadd  Strict-Transport-Security:\ max-age=15768000
   reqadd X-Forwarded-Proto:\ https
 {{range $app := lsdir "/services"}}
 {{$hostnames := printf "/services/%s/*" $app}}