Updated documentation (#74)

Author: bastien70

README.md

@@ -64,7 +64,10 @@ Requires [Symfony CLI](https://symfony.com/download) and [Task](https://taskfile
 
 ## Configure the CRON job <a name="cron"></a>
 
-Configuring a CRON job allows you to automatically backup databases at the frequency of your choice.
+Configure the CRON task allows you to activate the verification of backups to be made. **Set it up to run every day**.
+
+When you add databases, you can each time configure the periodicity of the backups to be made.
+The CRON task will automatically fetch the databases that need to be backed up and perform the automatic backup.
 
 Here is the command to run: `php bin/console app:backup`
 
@@ -103,7 +106,11 @@ You will find this storage space in the list.
 ### Manage databases <a name="databases"></a>
 
 To create a database, click the `Databases` tab, then the `Add a database` button.
-Fill your database information and submit.
+Fill your database information.
+
+Then, check the **backup options** according to your needs.
+
+Finally, configure the **periodicity** at which a backup must be executed for your database (example: every day, every 2 weeks, every 3 months, ...)
 
 ![Add a database](docs/images/database-create.png?raw=true)