doc: add info about syncrhonizing views

docs/source/installation/prod.rst

@@ -38,6 +38,14 @@ 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.
 
+Run migrations on each update
+=============================
+
+Every time you start a new version, you should apply update the sql schema:
+
+- running ``bin/console doctrine:migration:migrate`` to run sql migration;
+- synchonizing sql views to the last state: ``bin/console chill:db:sync-views``
+
 Cron jobs
 =========