Graylog behind NGINX Proxy in a sub-directory

nginx_graylog.conf

# Graylog in Subdirectorie
#
# server.conf settings:
#         rest_listen_uri = http://192.168.10.11:9000/serveurgraylog/api/
#         web_listen_uri = http://192.168.10.11:9000/serveurgraylog/
#
server {
        listen      80 ;
        server_name g1422.lan;

        location /serveurgraylog/ {
              proxy_set_header    Host $http_host;
              proxy_set_header    X-Forwarded-Host $host;
              proxy_set_header    X-Forwarded-Server $host;
              proxy_set_header    X-Forwarded-For $proxy_add_x_forwarded_for;
              proxy_set_header    X-Graylog-Server-URL http://$server_name/serveurgraylog/api;
              proxy_pass          http://192.168.10.11:9000/serveurgraylog/;
        }
}