Doc: [cronjob manager] Doc for implementing cronjob

docs/source/installation/prod.rst

@@ -1,10 +1,12 @@
 .. Copyright (C)  2014-2019 Champs Libres Cooperative SCRLFS
-Permission is granted to copy, distribute and/or modify this document
-under the terms of the GNU Free Documentation License, Version 1.3
-or any later version published by the Free Software Foundation;
-with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
-A copy of the license is included in the section entitled "GNU
-Free Documentation License".
+    Permission is granted to copy, distribute and/or modify this document
+    under the terms of the GNU Free Documentation License, Version 1.3
+    or any later version published by the Free Software Foundation;
+    with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
+    A copy of the license is included in the section entitled "GNU
+    Free Documentation License".
+
+.. _prod:
 
 Installation for production
 ###########################
@@ -36,12 +38,25 @@ This should be adapted to your needs:
 
 * Think about how you will backup your database. Some adminsys find easier to store database outside of docker, which might be easier to administrate or replicate.
 
+Cron jobs
+=========
+
+The command :code:`chill:cron-job:execute` should be executed every 15 minutes (more or less).
+
+This command should never be executed concurrently. It should be not have more than one process for a single instance.
+
+Post-install tasks
+==================
+
+- import addresses. See :ref:`addresses`.
+
+
 Tweak symfony messenger
 =======================
 
 Calendar sync is processed using symfony messenger.
 
-You can tweak the configuration 
+You can tweak the configuration
 
 Going further: