[taler-docs] branch master updated: Nexus tutorial: DB policy.

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     new 0022f4d  Nexus tutorial: DB policy.
0022f4d is described below

commit 0022f4d96651f2bca3b1a827f422f3500cc3dd1c
Author: MS <ms@taler.net>
AuthorDate: Tue Dec 13 20:31:22 2022 +0100

    Nexus tutorial: DB policy.
---
 libeufin/nexus-tutorial.rst | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libeufin/nexus-tutorial.rst b/libeufin/nexus-tutorial.rst
index 4b99e30..d2ec471 100644
--- a/libeufin/nexus-tutorial.rst
+++ b/libeufin/nexus-tutorial.rst
@@ -479,6 +479,11 @@ are supported right now.
 
 Use the following command to run the Nexus service:
 
+  Neuxs defaults to *not* storing the messages that it downloads
+  from the bank.  To revert this behaviour, export also the environment
+  variable ``LIBEUFIN_NEXUS_KEEP_BANK_MESSAGES`` to ``yes`` before
+  running the following command.
+
 .. code-block:: console
 
   $ export 
LIBEUFIN_NEXUS_DB_CONNECTION=jdbc:postgresql://localhost:5433/libeufindb?user=foo&password=secret

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