Expand environment.yml config notes
MODIFY
docs/source/config_files.rst
docs/source/config_files.rst
@@ -32,6 +32,8 @@ Below is a list of supported configuration files (roughly in the order of build
``environment.yml`` is the standard configuration file used by `conda <https://conda.io>`_
that lets you install any kind of package,
including Python, R, and C/C++ packages.
+``repo2docker`` does not use ``environment.yml`` to create and activate a new conda environment.
+Rather, it updates a base conda environment with the packages listed in ``environment.yml``.
.. note::

Expand environment.yml config notes