Add instructions to compile containers-tests on Windows (#941)

Added instructions to compile containers-test using symbolic links for Windows users

Co-authored-by: konsumlamm <[email protected]>

Author: AliceRixte

CONTRIBUTING.md

@@ -28,6 +28,15 @@ cabal test containers-test
 cabal bench containers-test
 ```
 
+#### For Windows users
+
+To compile `containers-test`, you need symbolic links to be activated on git.
+To do so on Windows 10 or higher, follow these steps:
+
+1. Activate developer mode in your Windows preferences.
+2. Enable git symlinks: `git config --global core.symlinks true`.
+3. Clone the repository again once git is properly configured.
+
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