update documentation

README.md

@@ -1,4 +1,4 @@
-# O3-Shop TinyMCE WYSIWYG Editor
+# O3-Shop TinyMCE WYSIWYG Editor for OXID eShop
 
 This module integrates the [TinyMCE WYSIWYG editor](https://www.tiny.cloud/tinymce/) in the OXID shop backend.
 
@@ -12,6 +12,8 @@ $ composer require d3/tinymce-editor
 $ vendor/bin/oe-console oe:module:install source/modules/o3-shop/tinymce-editor
 ```
 
+Create the directory ´source/out/pictures/wysiwigpro´ in the shop root directory and assign the necessary rights to make this writable.
+
 After requiring the module, you need to activate it, either via OXID shop admin or CLI.
 
 Navigate to shop folder and execute the following: