[FEATURE] Add action to fix example site config

Since TYPO3 messes up the base when being called from CLI
we add an action which can optionally reset it to a /

src/Install/Action/FixupSiteConfigAction.php

@@ -0,0 +1,60 @@
+<?php
+declare(strict_types=1);
+namespace Helhum\TYPO3\ConfigHandling\Install\Action;
+
+/***************************************************************
+ *  Copyright notice
+ *
+ *  (c) 2018 Helmut Hummel <[email protected]>
+ *  All rights reserved
+ *
+ *  The GNU General Public License can be found at
+ *  http://www.gnu.org/copyleft/gpl.html.
+ *  A copy is found in the text file GPL.txt and important notices to the license
+ *  from the author is found in LICENSE.txt distributed with these scripts.
+ *
+ *
+ *  This script is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  This copyright notice MUST APPEAR in all copies of the script!
+ ***************************************************************/
+
+use Helhum\Typo3Console\Install\Action\InstallActionInterface;
+use Helhum\Typo3Console\Mvc\Cli\CommandDispatcher;
+use Helhum\Typo3Console\Mvc\Cli\ConsoleOutput;
+use Symfony\Component\Yaml\Yaml;
+
+class FixupSiteConfigAction implements InstallActionInterface
+{
+
+    public function setOutput(ConsoleOutput $output)
+    {
+        $this->output = $output;
+    }
+
+    public function setCommandDispatcher(CommandDispatcher $commandDispatcher = null)
+    {
+        $this->commandDispatcher = $commandDispatcher;
+    }
+
+    public function shouldExecute(array $actionDefinition, array $options = []): bool
+    {
+        return true;
+    }
+
+    public function execute(array $actionDefinition, array $options = []): bool
+    {
+        $siteConfigFile = getenv('TYPO3_PATH_APP') . '/config/sites/main/config.yaml';
+        if (!file_exists($siteConfigFile)) {
+            return true;
+        }
+        $siteConfig = Yaml::parse(file_get_contents($siteConfigFile));
+        $siteConfig['base'] = '/';
+        file_put_contents($siteConfigFile, Yaml::dump($siteConfig, 99));
+
+        return true;
+    }
+}