first working version with simple WaitForContainerRunning implementation

src/Container/Container.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Testcontainers\Container;
+
+/**
+ * Added for backward compatibility.
+ * Just a wrapper for GenericContainer.
+ * @deprecated Use GenericContainer instead.
+ */
+class Container extends GenericContainer
+{
+}