react.dev/beta/src/sidebarHome.json

{
  "title": "Home",
  "heading": true,
  "path": "/",
  "routes": [
    {
      "heading": true,
      "path": "",
      "routes": [
        {
          "title": "Overview",
          "path": "/"
        },
        {
          "title": "Community",
          "path": "/community",
          "routes": [{
            "title": "Acknowledgements",
            "path": "/community/acknowledgements"
          }, {
            "title": "Meet the Team",
            "path": "/community/meet-the-team"
          }]
        }
      ]
    }
  ]
}