Errors with bin/console sylius:install on Debian Buster

Hi,

On my dev laptop, I have Debian buster.
I want to try Sylius.
Here are the commands I ran:

sudo apt-get install php php-mysql composer php-symfony php-curl php-gd mariadb-server
sudo /etc/init.d/mysql start
composer create-project sylius/sylius-standard MyFirstShop
cd MyFirstShop
bin/console sylius:install

I had this error:

An exception occurred in driver: SQLSTATE[HY000] [1045] Access denied for user ‘root’@‘localhost’

So I created the file .env.local :
DATABASE_URL=mysql://root:Pass@host/my_database

I know the root password is correct cause I can login with:

mysql -u root -p

I checked the database my_database doesn’t exist.

Now I have these errors:

Step 1 of 4. Checking system requirements.

Success! Your system can run Sylius properly.

Step 2 of 4. Setting up the database.

Creating Sylius database for environment dev.

In AbstractMySQLDriver.php line 93:
An exception occurred in driver: SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known
In PDOConnection.php line 34:
SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known
In PDOConnection.php line 30:
SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo failed: Name or service not known
In PDOConnection.php line 30:
PDO::__construct(): php_network_getaddresses: getaddrinfo failed: Name or service not known

sylius:install:database [-s|–fixture-suite [FIXTURE-SUITE]] [-h|–help] [-q|–quiet] [-v|vv|vvv|–verbose] [-V|–version] [–ansi] [–no-ansi] [-n|–no-interaction] [-e|–env ENV] [–no-debug] [–]

Any idea what I’m missing ?
Cheers

Unfortunately, I’m still stuck.
Could you please tell me where to find this kind of information ?
Thanks