gatsby creating pages from contentful

1const path = require('path')
2
3exports.createPages = ({graphql, boundActionCreators}) => {
4  const {createPage} = boundActionCreators
5  return new Promise((resolve, reject) => {
6    const storeTemplate = path.resolve('src/templates/store.js')
7    resolve(
8      graphql(`
9        {
10          allContentfulStore (limit:100) {
11            edges {
12              node {
13                id
14                name
15                slug
16              }
17            }
18          }
19        }
20      `).then((result) => {
21        if (result.errors) {
22          reject(result.errors)
23        }
24        result.data.allContentfulStore.edges.forEach((edge) => {
25          createPage ({
26            path: edge.node.slug,
27            component: storeTemplate,
28            context: {
29              slug: edge.node.slug
30            }
31          })
32        })
33        return
34      })
35    )
36  })
37}
38