Update PgBackRest wrapper script and move the config data into separate folder

ReadMe.md

@@ -2,16 +2,40 @@
 
 Wrapper to call the full/differential backup on all stanzas
 
-> [!notice]
-> Currently all stanzas are hardoded, this should change
-
 ## Options
 
 ```txt
 -b (backuptype): full/diff
--s (stanza): override stanza name, must be in list
+-s (stanza): override stanza name, must be in stanza.cfg file
 -l list available stanza
 -t test run
 ```
 
 Either `-l` or `-b` option must be set
+
+## Config
+
+Two files must be created
+
+### `config/pgbackrest.cfg`
+
+Example file is `pgbackrest.sample.cfg`
+
+This file holds the sudo_user for calling the commands
+
+```ini
+[PgBackRest]
+sudo_user=pgbackrest
+```
+
+### `config/stanza.cfg`
+
+Example file is `stanza.sample.cfg`
+
+This files holds the stanzas to backup
+
+```ini
+[stanzas]
+stanza_a
+stanza_b
+```