add comments in hapi plugin

Author: marcuspoehls

lib/index.js

@@ -5,14 +5,25 @@ const ErrorHandler = require('./error-handler')
 async function register (server, options) {
   const { showErrors = false, template, ...config } = options
 
+  /**
+   * Cut early and don’t register extension point,
+   * e.g. when in production.
+   */
   if (!showErrors) {
     return
   }
 
+  /**
+   * Ensure the user server is able to render
+   * templates when going for a custom one.
+   */
   if (template) {
     server.dependency(['vision'])
   }
 
+  /**
+   * Alright, go for gold!
+   */
   const errorHandler = new ErrorHandler({ template, ...config })
 
   server.ext('onPreResponse', async (request, h) => {