Update 'Migration notes'

Migration-notes.md

@@ -9,8 +9,6 @@ Apache 2.4.53
 
 # Database
 
-
-
 The database from HPR needs to be on the NEW server.
 
 Until we move the DNS to the new server we need to update the DB o
@@ -25,6 +23,18 @@ Instead of PHP My admin we might use https://dbeaver.io/
 - [ ]  
 - [ ]  
 
+## Synchronization
+
+After every change, we can use the script `OLD:/home/hpr/bin/hpr_db_backup.bash` to trigger a db dump of the db, rsync it to the NEW server and import the db,
+
+```
+$ cat /home/hpr/bin/hpr_db_backup.bash
+#!/bin/bash
+pw=$(grep -E '^\$password = ' /home/hpr/php/include.php | awk -F "'" '{print $2}' )
+pw=${pw##* }
+mysqldump --user=hpr_hpr --password="$pw" -c -e --default-character-set=utf8 --single-transaction --skip-set-charset --add-drop-database --databases hpr_hpr > /home/hpr/hpr_hpr.sql
+mysqldump --user=hpr_hpr --password="$pw" -c -e --default-character-set=utf8 --single-transaction --skip-set-charset --add-drop-database --databases hpr_hpr --ignore-table=hpr_hpr.reservations > /home/hpr/www/hpr.sql
+```
 
 
 # Redirects