Fix for "Error: Cannot mutate DI container after it has been initiali…

…sed"

Unable to include only when the field is in use as the DI has already been initialised

Checked how the JS and CSS is included for `asset-admin` and noticed that its
  included with LeftAndMain so doing the same thing for this and problem is
  no more :)

_config/config.yml

@@ -5,6 +5,7 @@ After:
   - '#assetadmingraphql-dependencies'
   - '#assetadminthumbnails'
   - '#assetsfieldtypes'
+  - '#assetadmin'
 ---
 
 SilverStripe\Core\Injector\Injector:
@@ -23,3 +24,9 @@ SilverStripe\Core\Injector\Injector:
 
   DBFile:
     class: MadeHQ\Cloudinary\Storage\DBFile
+
+SilverStripe\Admin\LeftAndMain:
+    extra_requirements_javascript:
+        - mademedia/silverstripe-cloudinary:client/dist/js/bundle.js
+    extra_requirements_css:
+        - mademedia/silverstripe-cloudinary:client/dist/styles/bundle.css

src/Forms/UploadFileField.php

@@ -28,8 +28,6 @@ public function __construct($name, $title = null, $value = null)
             TextareaField::create(sprintf('%s[Description]', $name), 'Description'),
         ];
 
-        Requirements::javascript('resources/mademedia/silverstripe-cloudinary/client/dist/js/bundle.js');
-        Requirements::css('resources/mademedia/silverstripe-cloudinary/client/dist/styles/bundle.css');
         parent::__construct($name, $title, $value);
         $this->setTemplate('UploadFileField');
     }