update jupyter page to add note about using Conda

docs/source/applications/jupyter.rst

@@ -22,6 +22,11 @@ One way to do this would be to start an interactive session on a compute node, f
 
 Here we have an interactive ``bash`` session on the ``node112`` compute node, with five CPU cores, for eight hours. Next we load the ``Jupyter`` module and run the server:
 
+.. attention::
+
+    In this example we're using the Jupyter **module** on Viking. If you are using Conda to install Jupyter alongside other packages you should **not** run the ``module load {MOD_JUPYTER}`` command below, skip that command and the rest should still be valid. Instead you should activate your Conda environment where you have Jupyter installed.
+
+
 .. code-block:: console
     :emphasize-lines: 16,17