Switched About screen to use config service

ghost/admin/app/controllers/about.js

@@ -1,13 +1,12 @@
 import Controller from '@ember/controller';
 import {computed} from '@ember/object';
-import {readOnly} from '@ember/object/computed';
 import {inject as service} from '@ember/service';
 
+/* eslint-disable ghost/ember/alias-model-in-controller */
 export default Controller.extend({
+    config: service(),
     upgradeStatus: service(),
 
-    about: readOnly('model'),
-
     copyrightYear: computed(function () {
         let date = new Date();
         return date.getFullYear();

ghost/admin/app/routes/about.js

@@ -3,30 +3,7 @@ import styleBody from 'ghost-admin/mixins/style-body';
 import {inject as service} from '@ember/service';
 
 export default AuthenticatedRoute.extend(styleBody, {
-    ghostPaths: service(),
-    ajax: service(),
-
     titleToken: 'About',
 
-    classNames: ['view-about'],
-
-    cachedConfig: false,
-
-    model() {
-        let cachedConfig = this.get('cachedConfig');
-        let configUrl = this.get('ghostPaths.url').api('configuration', 'about');
-
-        if (cachedConfig) {
-            return cachedConfig;
-        }
-
-        return this.get('ajax').request(configUrl)
-            .then((configurationResponse) => {
-                let [cachedConfig] = configurationResponse.configuration;
-
-                this.set('cachedConfig', cachedConfig);
-
-                return cachedConfig;
-            });
-    }
+    classNames: ['view-about']
 });

ghost/admin/app/templates/about.hbs

@@ -5,10 +5,10 @@
     <section class="view-container">
         <section class="gh-env-details">
             <ul class="gh-env-list">
-                <li class="gh-env-list-version"><strong>Version</strong> {{about.version}}</li>
-                <li><strong>Environment</strong> {{about.environment}}</li>
-                <li class="gh-env-list-database-type"><strong>Database</strong> {{about.database}}</li>
-                <li><strong>Mail</strong> {{#if about.mail}}{{about.mail}}{{else}}Native{{/if}}</li>
+                <li class="gh-env-list-version"><strong>Version</strong> {{config.version}}</li>
+                <li><strong>Environment</strong> {{config.environment}}</li>
+                <li class="gh-env-list-database-type"><strong>Database</strong> {{config.database}}</li>
+                <li><strong>Mail</strong> {{#if config.mail}}{{config.mail}}{{else}}Native{{/if}}</li>
             </ul>
             <div class="gh-env-help">
                 <a class="gh-btn" href="https://docs.ghost.org" target="_blank"><span>User Documentation</span></a>