mstream_ynh/conf/nginx.conf

#sub_path_only rewrite ^__PATH__$ __PATH__/ permanent;
location __PATH__/ {

  proxy_pass http://127.0.0.1:__PORT__/;
  proxy_http_version 1.1;
  proxy_set_header Host $host;
  proxy_set_header Upgrade $http_upgrade;
  proxy_set_header Connection "upgrade";
}