Created new service which is the database connection but without the dbname, and used in in create db command

module/Common/src/Doctrine/NoDbNameConnectionFactory.php

@@ -0,0 +1,21 @@
+<?php
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\Common\Doctrine;
+
+use Doctrine\DBAL\Connection;
+use Psr\Container\ContainerInterface;
+
+class NoDbNameConnectionFactory
+{
+    public const SERVICE_NAME = 'Shlinkio\Shlink\Common\Doctrine\NoDbNameConnection';
+
+    public function __invoke(ContainerInterface $container): Connection
+    {
+        $conn = $container->get(Connection::class);
+        $params = $conn->getParams();
+        unset($params['dbname']);
+
+        return new Connection($params, $conn->getDriver(), $conn->getConfiguration(), $conn->getEventManager());
+    }
+}