Only load Core\Application if Nextcloud is installed

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

Author: come-nc

.htaccess

@@ -102,3 +102,7 @@
 
 AddDefaultCharset utf-8
 Options -Indexes
+#### DO NOT CHANGE ANYTHING ABOVE THIS LINE ####
+
+ErrorDocument 403 /
+ErrorDocument 404 /

lib/private/Console/Application.php

@@ -70,8 +70,10 @@ public function __construct(IConfig $config,
 		$this->request = $request;
 		$this->logger = $logger;
 		$this->memoryInfo = $memoryInfo;
-		/* Build core application to make sure that listeners are registered */
-		\OC::$server->query(CoreApplication::class);
+		if ($config->getSystemValueBool('installed')) {
+			/* Build core application to make sure that listeners are registered */
+			\OC::$server->query(CoreApplication::class);
+		}
 	}
 
 	/**