Ensured install tool knows the install command is the only one

bin/install

@@ -1,5 +1,6 @@
 #!/usr/bin/env php
 <?php
+declare(strict_types=1);
 
 use Shlinkio\Shlink\CLI\Factory\InstallApplicationFactory;
 use Shlinkio\Shlink\CLI\Install\Plugin\DatabaseConfigCustomizer;

bin/update

@@ -1,5 +1,6 @@
 #!/usr/bin/env php
 <?php
+declare(strict_types=1);
 
 use Shlinkio\Shlink\CLI\Factory\InstallApplicationFactory;
 use Shlinkio\Shlink\CLI\Install\Plugin\DatabaseConfigCustomizer;

module/CLI/src/Command/Install/InstallCommand.php

@@ -102,7 +102,7 @@ class InstallCommand extends Command
 
         $this->io->writeln([
             '<info>Welcome to Shlink!!</info>',
-            'This will guide you through the installation process.',
+            'This tool will guide you through the installation process.',
         ]);
 
         // Check if a cached config file exists and drop it if so

module/CLI/src/Factory/InstallApplicationFactory.php

@@ -50,7 +50,7 @@ class InstallApplicationFactory implements FactoryInterface
             $isUpdate
         );
         $app->add($command);
-        $app->setDefaultCommand($command->getName());
+        $app->setDefaultCommand($command->getName(), true);
 
         return $app;
     }