Improved README.md

README.md

@@ -1,5 +1,37 @@
 # Zephyr configurator
 
+## Project structure
+### File structure
+```
+├── data
+│   ├── app.overlay
+│   ├── CMakeLists.txt
+│   ├── main.c
+│   ├── prj.conf
+│   └── VERSION
+├── Dockerfile
+├── Entwicklungsleitfaden.md
+├── images
+│   ├── ...
+├── README.md
+├── script.sh
+└── snippets
+    ├── ...
+```
+
+`data` contains the empty project, that is used to generate a new project \
+`images` contains images for the documentation \
+`snippets` contains code snippets for functions \
+`script.sh` main script
+
+### Snippets
+The snippets are used to add new functions to the project. Each function has one directory with one or more files.
+
+To add new functions, you have to create a new directory in the `snippets`-directory and adjust the script.
+
+### script.sh
+The main script that is the entrypoint of the docker container
+
 ## Run
 ### [Optional] Build manually
 ```