[taler-docs] branch master updated: document libeufin-sandbox invocation sans LIBEUFIN_SANDBOX_DB_CONNECTION env var

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The following commit(s) were added to refs/heads/master by this push:
     new 474f160  document libeufin-sandbox invocation sans 
LIBEUFIN_SANDBOX_DB_CONNECTION env var
474f160 is described below

commit 474f160fd21e2697f11eebf642952e1807b06577
Author: Thien-Thi Nguyen <ttn@gnuvola.org>
AuthorDate: Tue Aug 10 14:23:53 2021 -0400

    document libeufin-sandbox invocation sans LIBEUFIN_SANDBOX_DB_CONNECTION 
env var
    
    see also <https://bugs.gnunet.org/view.php?id=6695>
---
 libeufin/nexus-tutorial.rst | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/libeufin/nexus-tutorial.rst b/libeufin/nexus-tutorial.rst
index 53fae68..4fcb9e2 100644
--- a/libeufin/nexus-tutorial.rst
+++ b/libeufin/nexus-tutorial.rst
@@ -135,7 +135,15 @@ core banking system with EBICS access to bank accounts.
 The sandbox relies on a database, which you must specify using a JDBC
 connection URI with the ``LIBEUFIN_SANDBOX_DB_CONNECTION`` environment
 variable, before invoking any commands.
-(If this variable is not set, ``libeufin-sandbox`` complains and exits.)
+If this variable is not set, ``libeufin-sandbox`` complains and exits:
+
+.. code-block:: console
+
+  $ libeufin-sandbox serve
+  DB connection string not found/valid in the env variable 
LIBEUFIN_SANDBOX_DB_CONNECTION.
+  The following two examples are valid connection strings:
+  jdbc:sqlite:/tmp/libeufindb.sqlite3
+  jdbc:postgresql://localhost:5432/libeufindb?user=Foo&password=secret
 
 Only *SQLite* (e.g. ``jdbc:sqlite:/tmp/libeufintestdb``) and *PostgreSQL (via 
TCP)*
 (e.g. 
``jdbc:postgresql://localhost:$port/libeufintestdb?user=$username&password=$password``)

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