Add headers

README.rst

@@ -34,10 +34,16 @@ Library prototyping based on Calibre with Flask
 Example
 *******
 
+app.cfg
+=======
+
 .. code-block:: cfg
 
     CALIBRESTEKJE_SQLITE_URL = "sqlite:///mymetadata.db"
 
+app.py
+======
+
 .. code-block:: python
 
     from calibrestekje import Book
@@ -53,6 +59,14 @@ Example
     def home():
         return jsonify({"book-count": db.session.query(Book).count()})
 
+command-line
+============
+
+.. code-block:: bash
+
+    $ export FLASK_APP=app.py
+    $ flask run
+
 .. _documentation:
 
 Documentation