gatsby-config.js

module.exports = {
  plugins: [
    `gatsby-plugin-offline`,
    `gatsby-plugin-react-helmet`,
    {
      resolve: `gatsby-source-filesystem`,
      options: {
        path: `${__dirname}/src/pages`,
        name: 'pages',
      },
    },
    {
      resolve: 'gatsby-source-cosmicjs',
      options: {
        bucketSlug: 'gatsby-blog-cosmic-js', // Bucket Slug
        objectTypes: ['posts','settings'], // List of the Object Types you want to be able to request from Gatsby.
        apiAccess: {
          read_key: '',
        }
      }
    },
  ],
}