Develop (#25)

* update readme

* Update README.md

README.md

@@ -28,11 +28,12 @@ cd /directory/to/rosbridge-web-architecture-demo
 # Start project
 yarn start # --build (if needed)
 
-# Cleanup network & images
+# Cleanup docker networks & images
 yarn clean
 ```
 
 At this point you can visit the UI using your browser `http://localhost:3000`
+> If you need to change ports in the frontend for whatever reason, you can do so by editing the `docker-compose.yml` file on line 55 to `- "XXXX:3000"` 
 
 ## Architecture
 ![SpeakerDraw drawio](https://user-images.githubusercontent.com/19492279/135118667-886d8e76-0c53-48ae-86b9-b99c14dda7df.png)