Created new Installer module and moved everything from CLI there

module/Installer/src/Config/Plugin/UrlShortenerConfigCustomizer.php

@@ -0,0 +1,44 @@
+<?php
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\Installer\Config\Plugin;
+
+use Shlinkio\Shlink\Core\Service\UrlShortener;
+use Shlinkio\Shlink\Installer\Model\CustomizableAppConfig;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use function str_shuffle;
+
+class UrlShortenerConfigCustomizer implements ConfigCustomizerInterface
+{
+    /**
+     * @param SymfonyStyle $io
+     * @param CustomizableAppConfig $appConfig
+     * @return void
+     */
+    public function process(SymfonyStyle $io, CustomizableAppConfig $appConfig)
+    {
+        $io->title('URL SHORTENER');
+
+        if ($appConfig->hasUrlShortener() && $io->confirm('Do you want to keep imported URL shortener config?')) {
+            return;
+        }
+
+        // Ask for URL shortener params
+        $appConfig->setUrlShortener([
+            'SCHEMA' => $io->choice(
+                'Select schema for generated short URLs',
+                ['http', 'https'],
+                'http'
+            ),
+            'HOSTNAME' => $io->ask('Hostname for generated URLs'),
+            'CHARS' => $io->ask(
+                'Character set for generated short codes (leave empty to autogenerate one)',
+                null,
+                function ($value) {
+                    return $value;
+                }
+            ) ?: str_shuffle(UrlShortener::DEFAULT_CHARS),
+            'VALIDATE_URL' => $io->confirm('Do you want to validate long urls by 200 HTTP status code on response'),
+        ]);
+    }
+}