add Environment library

src/library/environment.php

@@ -0,0 +1,27 @@
+<?php
+
+class Environment
+{
+  public static function config(string $name) : object
+  {
+    $config = __DIR__ . '/../config/' . $name . '.json';
+
+    if (file_exists(__DIR__ . '/../config/.env'))
+    {
+      $environment = file_get_contents(__DIR__ . '/../config/.env');
+
+      $filename = __DIR__ . '/../config/' . $environment . '/' . $name . '.json';
+
+      if (file_exists($filename))
+      {
+        $config = $filename;
+      }
+    }
+
+    return json_decode(
+      file_get_contents(
+        $config
+      )
+    );
+  }
+}