gatsby-plugin-fathom

npm install gatsby-plugin-fathom

// gatsby-config.js
module.exports = {
  plugins: [
    {
      resolve: 'gatsby-plugin-fathom',
      options: {
        // Fathom server URL. Defaults to `cdn.usefathom.com`
        trackingUrl: 'your-fathom-instance.com',
        // Unique site id
        siteId: 'FATHOM_SITE_ID',
        // Domain whitelist
        whitelistHostnames: [
          'yoursite.com'
        ]
      }
    }
  ]
}