You will have to
nano /ect/ssh/sshd_config

and alterate AllowRootLogin line to AllowRootLogin yes

then restart ssh:systemctl restart ssh

You can find all active mountpoint url @ http://debianip:8000/status.xsl

for example, one radio url here is http://192.168.1.73:8000/spotify.aac

I’ve setup a docker with ssh and x11 support via no-vnc to achive both free and premium edition
here is the corresponding docker-compose to adapt

services:
  debian13-gui:
    image: chourmovs/debian13-vnc-novnc-ssh:latest
    container_name: debian13-gui
    restart: unless-stopped

    # Alpine host: /dev/snd peut ne pas exister au déploiement => pas de devices:
    # privileged pour ne pas bloquer le stack et permettre l'accès aux devices si dispo.
    privileged: true
    network_mode: host


    environment:
      USERNAME: "debian"
      USER_UID: "1000"
      USER_GID: "1000"

      SSH_PASSWORD: "hackme"
      VNC_PASSWORD: "hackme"

      ROOT_PASSWORD: "hackme"
      ALLOW_ROOT_SSH: "yes"

      VNC_GEOMETRY: "1600x900"
      VNC_DEPTH: "24"


      # IMPORTANT: en host mode, ce port est le port HÔTE
      ICECAST_PORT: "28000"

    shm_size: "512m"

    volumes:
      - debian13_home:/root

volumes:
  debian13_home: