Add link from quick guide to database / files setup

Signed-off-by: Michal Čihař <michal@cihar.com>

docs/admin/install.rst

@@ -369,6 +369,8 @@ options:
 
     .. seealso:: `SERVER_EMAIL documentation`_
 
+.. _database-setup:
+
 Filling up the database
 -----------------------
 

docs/admin/quick.rst

@@ -22,7 +22,8 @@ Installing from sources
 
 #. Create database which will be used by Weblate, :ref:`database-setup`.
 
-#. Build Django tables and initial data:
+#. Build Django tables, static files and initial data (see
+   :ref:`database-setup` and :ref:`static-files`):
 
    .. code-block:: sh