Update needed directory permissions in README

README.md

@@ -38,7 +38,7 @@ To report bugs use [engelsystem/issues](https://github.com/engelsystem/engelsyst
     yarn build
     ```
 
- * The webserver must have write access to the ```import``` directory and read access for all other directories
+ * The webserver must have write access to the ```import``` and ```storage``` directories and read access for all other directories
  * The webserver must point to the ```public``` directory.
  * The webserver must read the ```.htaccess``` file and ```mod_rewrite``` must be enabled