added default envs to the serverside rendering

src/gatsby-ssr.js

@@ -1,10 +1,18 @@
 import React from 'react';
 
+const defaultOptions = {
+  environments: ['production'],
+  googleAnalytics: {
+    anonymize: true
+  }
+}
+
 exports.onRenderBody = ({ setHeadComponents }, pluginOptions = {}) => {
   const currentEnvironment = process.env.ENV || process.env.NODE_ENV || "development";
+  const options = Object.assign(defaultOptions, pluginOptions);
 
   // add the facebook pixel script by default to the page - it does not initialize or track anything to this point. :-)
-  if (pluginOptions.environments.includes(currentEnvironment)) {
+  if (options.environments.includes(currentEnvironment)) {
     return setHeadComponents([
       <script
         key={`gatsby-plugin-gdpr-cookies`}