update docs

docs/10_Get_started/20_Installation_with_Docker.md

 # Installation with a local Docker service
 
 For development a docker environment is part of the repository data.
+You can use it for a first view on your own machine before installing it.
 
 ## Requirements
 

docs/10_Get_started/30_Filestructure.md

@@ -53,9 +53,6 @@ Default: /var/www/[YOUR-DOMAIN]/public_html/
 │       └── 4.21.0
 │           └── img
 │               └── network
-├── versions
-│   ├── classes
-│   └── data
 └── webservice
 ```