Move the array creation to the right place

Author: tcbyrd

graphql/enterprise/index.html

@@ -171,9 +171,10 @@ <h3>Create a <a href="https://help.github.com/articles/creating-a-personal-acces
       function graphQLFetcher(graphQLParams) {
         // Determine the API URL for this GitHub Enterprise server
 
+        const hostnames = location.hostname.split('.')
+
         if (hostnames[0] === "pages") {
-          // subdomain isolation enabled
-          const hostnames = location.hostname.split('.')
+          // subdomain isolation enabled, so remove the first part of the URL
           hostnames.shift()
           const apiHost = location.protocol + '//' + hostnames.join('.')
         } else {