index.js

// imports and stuff ...
...

// "data" is passed by Gatsby with result of "StoriesQuery"
const IndexPage = ({ data }) => (
  <Stories stories={data.allTopStories.edges} title="Top Stories" />
)

export default IndexPage

export const query = graphql`
  query StoriesQuery {
    allTopStories {
      edges {
        node {
          id
          storyId
          item {
            id
            title
            score
            by
            time
            type
            url
          }
        }
      }
    }
  }
`