Put the project on a php enabled webserver. Php should be able to connect to a mysql/maria database.
Create file db_password.php with content like:
<?php
$dbPassword = 'my_secret_password';
... and put in the password to your 'asterisk' cdr db
You might want to set the modes of this file like:
-rw-r----- 1 root www-data 31 Apr 5 15:52 db_password.php
... assuming the web server runs as group www-data.
This avoid other users on the host being able to see the
db password.