Troubleshooting GraphQL deployment in a Stackbit/Gatsby project with Sanity

Error: Encountered anonymous inline object "header" for field/type "Config". To use this field with GraphQL you will need to create a top-level schema type for it. See <https://docs.sanity.io/help/schema-lift-anonymous-object-type>

export default {
  "type": "object",
  "name": "header",
  "title": "Header Configuration",
  "validation": null,
  "fields": [
    {
      "type": "string",
      "name": "title",
      "title": "Header Title",
      "description": "The title displayed in the header if no logo image added.",
      "validation": null
    },
    {
      "type": "image",
      "name": "logo_img",
      "title": "Logo",
      "description": "The logo image displayed in the header.",
      "validation": null
    },
    {
      "type": "boolean",
      "name": "has_nav",
      "title": "Enable Navigation Menu",
      "description": "Display the navigation menu bar in the header.",
      "initialValue": true,
      "validation": null
    },
    {
      "type": "array",
      "name": "actions",
      "title": "Action Buttons",
      "description": "The action buttons displayed in the menu.",
      "validation": null,
      "of": [{"type": "action"}]
    }
  ]
}

{
  "type": "header",
  "name": "header",
  "title": "Header Config",
}