jupyterlab/docker/jupyter_server_config.json

{
  "ServerApp": {
    "allow_origin": "*",
    "ip": "0.0.0.0",
    "port": 8888,
    "open_browser": false,
    "root_dir": "/home/micromamba/jlab_root"
  },
  "LabApp": {
    "dev_mode": true
  }
}