Merge pull request piccolo-orm#132 from aminalaee/update-engine-docs-piccolo-conf-example

update-engine-docs-piccolo-conf-example

Author: dantownsend

docs/src/piccolo/engines/index.rst

@@ -95,7 +95,12 @@ variable accordingly.
 
     DB = SQLiteEngine(path='my_test_db.sqlite')
 
-.. hint:: You can also specify sub modules, like `my_module.piccolo_conf`.
+If the ``piccolo_conf.py`` file is located in a sub-module (rather than the
+root of your project) you can specify the path like this:
+
+.. code-block:: bash
+
+    export PICCOLO_CONF=sub_module.piccolo_conf
 
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