text: require('dotenv').config({
    path: `.env.${process.env.NODE_ENV}`,
  });
  
  const contentfulConfig = {
    spaceId: process.env.CONTENTFUL_SPACE_ID,
    accessToken: process.env.CONTENTFUL_ACCESS_TOKEN,
  };
  
  // if you want to use the preview API please define
  // CONTENTFUL_HOST in your environment config
  // the `host` property should map to `preview.contentful.com`
  // https://www.contentful.com/developers/docs/references/content-preview-api/#/reference/spaces/space/get-a-space/console/js
  if (process.env.CONTENTFUL_HOST) {
    contentfulConfig.host = process.env.CONTENTFUL_HOST;
  }
  
  const { spaceId, accessToken } = contentfulConfig;
  
  if (!spaceId || !accessToken) {
    throw new Error(
      'Contentful spaceId and the access token need to be provided.',
    );
  }
  
  module.exports = {
    siteMetadata: {
      title: 'Gatsby Contentful starter',
    },
    pathPrefix: '/gatsby-contentful-starter',
    plugins: [
      'gatsby-transformer-remark',
      'gatsby-transformer-sharp',
      'gatsby-plugin-react-helmet',
      'gatsby-plugin-sharp',
      {
        resolve: 'gatsby-source-contentful',
        options: contentfulConfig,
      },
    ],
  };
  