gatsby-config.js

//to disable netlify deploy previews from being crawled
const {
  NODE_ENV,
  URL: NETLIFY_SITE_URL = 'https://textify-image.netlify.app/',
  DEPLOY_PRIME_URL: NETLIFY_DEPLOY_URL = NETLIFY_SITE_URL,
  CONTEXT: NETLIFY_ENV = NODE_ENV,
} = process.env;
const isNetlifyProduction = NETLIFY_ENV === 'production';
const siteUrl = isNetlifyProduction ? NETLIFY_SITE_URL : NETLIFY_DEPLOY_URL;

module.exports = {
  siteMetadata: {
    title: 'Textify',
    titleTemplate: '%s | Textify',
    description:
      'Free online OCR service for converting images, photos and screenshots to text',
    siteUrl,
    image: '/images/og_image.jpg',
    twitterUsername: '@gbsolomon1',
  },
  plugins: [
    `gatsby-plugin-sass`,
    `gatsby-plugin-react-helmet`,
    `gatsby-plugin-sitemap`,
    {
      resolve: 'gatsby-plugin-robots-txt',
      options: {
        resolveEnv: () => NETLIFY_ENV,
        env: {
          production: {
            policy: [{ userAgent: '*' }],
          },
          'branch-deploy': {
            policy: [{ userAgent: '*', disallow: ['/'] }],
            sitemap: null,
            host: null,
          },
          'deploy-preview': {
            policy: [{ userAgent: '*', disallow: ['/'] }],
            sitemap: null,
            host: null,
          },
        },
      },
    },
    {
      resolve: `gatsby-plugin-typography`,
      options: {
        pathToConfigModule: `src/utils/typography`,
      },
    },
    {
      resolve: `gatsby-plugin-purgecss`,
      options: {
        printRejected: true,
        develop: true,
        whitelist: ['fa-file-image'],
      },
    },
    {
      resolve: `gatsby-plugin-manifest`,
      options: {
        name: `Textify`,
        short_name: `Textify`,
        start_url: `/`,
        background_color: `#fff`,
        theme_color: `#fff`,
        display: `standalone`,
        icon: `src/assets/images/logo.png`,
        icon_options: {
          purpose: `any maskable`,
        },
      },
    },
    {
      resolve: `gatsby-plugin-offline`,
      options: {
        precachePages: [`/index/`, `/all-queries/`, `/edit/*`],
      },
    },
  ],
};