etc/nginx/site.d/roundcube/http.conf

   1 server {
   2         listen 80;
   3         server_name
   4          roundcube.heureux-cyclage.org
   5          roundcube.cyclocoop.org
   6          roundcube.ptitvelo.net;
   7
   8         return 301 https://$host$request_uri;
   9  }