chore: added warning about global dependencies

Author: ielaajezdev

docs/01-usage.md

@@ -2,3 +2,8 @@
 
 Refer to the [service-template-python](https://github.com/VU-ASE/service-template-python) for a complete example on how to use this library.
 
+:::warning[Global Dependencies]
+
+If your service relies on global dependencies (such as `pip` modules), you must make sure that these dependencies are installed on the Rover for the `debix` user. 
+
+:::