docs: tweak Storybook configs

.storybook/preview-body.html

@@ -1,6 +1,2 @@
 <link rel="stylesheet" href="css/preview-body.css"/>
 <script src="js/preview-body.js"></script>
-
-<div id="root">
-  <div id="ui-positioning-root"></div>
-</div>

ember-cli-build.js

@@ -9,6 +9,16 @@ module.exports = function (defaults) {
       out: null,
       json: './dist/docs/index.json',
     },
+
+    'ember-cli-storybook': {
+      enableAddonDocsIntegration: false,
+    },
+
+    addons: {
+      blacklist: [
+        process.env.STORYBOOK === 'true' ? undefined : '@storybook/ember-cli-storybook',
+      ].filter(Boolean),
+    },
   });
 
   app.import('node_modules/bootstrap3/dist/css/bootstrap.css');

package.json

@@ -161,5 +161,8 @@
   "volta": {
     "node": "18.12.1",
     "npm": "8.19.2"
+  },
+  "storybook": {
+    "ignoreTestFiles": true
   }
 }