overrides.json

{
  "jupyterlab-tour:user-tours": {
    "tours": [
      {
        "id": "jupyter-lite",
        "label": "Welcome to JupyterLite",
        "steps": [
          {
            "target": "#jp-MainLogo",
            "content": "This is JupyterLite"
          }
        ],
        "options": {}
      }
    ]
  }
}