#role server_docker-turn-server

May this service needs to be implemented for jitis. It's directly integrated in the docker compose file of role server_docker-nextcloud

## see
- https://nextcloud-talk.readthedocs.io/en/latest/TURN/
- https://hub.docker.com/r/instrumentisto/coturn
- https://forum.openmediavault.org/index.php?thread/31782-server_docker-nextcloud-talk-plugin-and-turnserver/
- https://markus-blog.de/index.php/2020/11/20/how-to-run-nextcloud-talk-high-performance-backend-with-stun-turnserver-on-ubuntu-with-docker-compose/
- https://github.com/crazy-max/server_docker-nextcloud/issues/15