Add EN Windows instructions for package.json scripts

English

Author: RiikkaDream

src/content/3/en/part3b.md

@@ -388,6 +388,15 @@ The script looks like this
   }
 }
 ```
+  
+##### Note for Windows users
+Note that the standard shell commands in `build:ui` do not natively work in Windows. Powershell in Windows works differently, in which case the script could be written as
+```json
+"build:ui": "Remove-Item -Recurse -Force build && cd ../frontend && npm run build && Copy-Item build -Recurse ../backend",
+```
+  
+If the script does not work on Windows, confirm that you are using Powershell and not Command Prompt. If you have installed Git Bash or another Linux-like terminal, you may be able to run Linux-like commands on Windows as well.
+
 
 The script _npm run build:ui_ builds the frontend and copies the production version under the backend repository.  _npm run deploy_ releases the current backend to Fly.io.