Fix debug setting exception handler

resources/views/errors/500.twig

@@ -1 +1 @@
-An error has occured
+Er is helaas iets mis gegaan. Probeer het opnieuw

src/Runtime/Config/Env.php

@@ -27,8 +27,8 @@ class Env {
     private static function filter(string $result)
     {
         switch ($result) {
-            case filter_var($result, FILTER_VALIDATE_BOOLEAN):
-                return (bool) $result;
+            case in_array($result, ['true', 'false']):
+                return filter_var($result, FILTER_VALIDATE_BOOLEAN);
                 break;
             case filter_var($result, FILTER_VALIDATE_INT):
                 return (int) $result;

src/Runtime/Exceptions/ExceptionHandler.php

@@ -8,6 +8,7 @@ use Whoops\Handler\PlainTextHandler;
 use Whoops\Run;
 use Whoops\Handler\PrettyPageHandler;
 use Whoops\Util\Misc;
+use function DI\value;
 
 class ExceptionHandler {
 
@@ -40,7 +41,7 @@ class ExceptionHandler {
     {
         self::$handler = new Run();
 
-        $debug = true; //TODO: Get from config
+        $debug = env('debug');
 
         if($debug === false) {
             self::$handler->pushHandler(function() {