add docker start introduction

wiki.md

@@ -123,6 +123,14 @@ then go to [Local Demo Website](http://127.0.0.1:8000/) to see an online visuali
 - Then you can just playing ChatDev with ``python3 run.py``
 - You can run ``python3 online_log/app.py &`` first to start a background program so that you can use online log with a WebUI.
 
+### Copy the generated software out of Docker
+- run 
+    ```commandline
+    docker cp container_id:/path/in/container /path/on/host
+    ```
+### Official Docker Image
+- in preparation
+
 ## Customization
 
 - You can customize your company in three kinds of granularity: