fix(http): use document root instead of env in tempest serve (#717)

Author: aazsamir

src/Tempest/Http/src/Commands/ServeCommand.php

@@ -14,7 +14,6 @@
     )]
     public function __invoke(string $host = 'localhost', int $port = 8000, string $publicDir = 'public/'): void
     {
-        putenv("TEMPEST_PUBLIC_DIR={$publicDir}");
         $routerFile = __DIR__ . '/router.php';
         passthru("php -S {$host}:{$port} -t {$publicDir} {$routerFile}");
     }

src/Tempest/Http/src/Commands/router.php

@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-$publicPath = getcwd() . '/' . rtrim($_ENV['TEMPEST_PUBLIC_DIR'], '/');
+$publicPath = $_SERVER['DOCUMENT_ROOT'];
 
 if (file_exists($publicPath . $_SERVER['REQUEST_URI'])) {
     return false;