update app upbloading instructions

en/firstinterhacktions.md

@@ -65,7 +65,12 @@ Go to the [hatchery](https://badge.team/?badge=card10), register an account, and
 Klick on 'Add' to create an egg for your app in the hatchery.  Pick a category, select _card10_ for the compatibility, and add a title and description.
 You can even use libraries from existing apps, which you can add as dependencies in the next menu.
 
-Your app comes with an empty `__init__.py` file, this is needed by python. You can then upload your script file(s) in addition to it.
+Your app comes with an empty `__init__.py` file, this is where your main code goes. You can also upload further libraries and 
+configuration files.
+When naming additional configuration files, bear in mind that there is a text file reader that displays `.txt` files on the card10 display,
+so name your files accordingly if you want them to show up (or not).
+
+
 Once you are satisfied, you can publish it in an official revision. As you improve your code, you can re-upload your files and publish new versions.
 
 ### Closing a session