added note brfore executing the entry points

docs/projects.rst

@@ -387,10 +387,12 @@ Then, standing inside the 'client folder', you can test *train* and *validate* b
 
 You can also test *train* and *validate* entrypoint using CLI command:
 
+.. note:: Before running the fedn run train or fedn run validate commands, make sure to download the training and test data. The downloads are usually handled by the "fedn run startup" command.
+
 .. code-block:: bash
 
     fedn run train --path client --input <path to input model parameters> --output <path to write the updated model parameters>
-    fedn run validate --path client --input <path to input model parameters> --output <Path to write the output JSON containing validation metrics>
+    fedn run validate --path client --input <path to input model parameters> --output <path to write the output JSON containing validation metrics>
 
 Packaging for training on FEDn
 ===============================