Build modified streamline images

The official image from streamline does not currently work for the arm64
platform. As a temporary measure, the source code and docker build scripts
have been lifted from the official images and are used to build locally.

Some additional modifications are made to reduce overall image size, these
are documented in docker/README.md

docker/streamline-src/vendor/psy/psysh/src/CodeCleaner/LeavePsyshAlonePass.php

@@ -0,0 +1,38 @@
+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2023 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Psy\CodeCleaner;
+
+use PhpParser\Node;
+use PhpParser\Node\Expr\Variable;
+use Psy\Exception\RuntimeException;
+
+/**
+ * Validate that the user input does not reference the `$__psysh__` variable.
+ */
+class LeavePsyshAlonePass extends CodeCleanerPass
+{
+    /**
+     * Validate that the user input does not reference the `$__psysh__` variable.
+     *
+     * @throws RuntimeException if the user is messing with $__psysh__
+     *
+     * @param Node $node
+     *
+     * @return int|Node|null Replacement node (or special return value)
+     */
+    public function enterNode(Node $node)
+    {
+        if ($node instanceof Variable && $node->name === '__psysh__') {
+            throw new RuntimeException('Don\'t mess with $__psysh__; bad things will happen');
+        }
+    }
+}