update dockerfiles based on latest streamline image

The latest images incorporate all changes previously added by the dockerfiles.
The arm image however is still missing/unreliable from the registry and must be
built independently.

docker/streamline-src/vendor/league/commonmark/src/Input/MarkdownInputInterface.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the league/commonmark package.
+ *
+ * (c) Colin O'Dell <colinodell@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace League\CommonMark\Input;
+
+interface MarkdownInputInterface
+{
+    public function getContent(): string;
+
+    /**
+     * @return iterable<int, string>
+     */
+    public function getLines(): iterable;
+
+    public function getLineCount(): int;
+}