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/symfony/console/Question/ConfirmationQuestion.php

@@ -0,0 +1,57 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Console\Question;
+
+/**
+ * Represents a yes/no question.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class ConfirmationQuestion extends Question
+{
+    private string $trueAnswerRegex;
+
+    /**
+     * @param string $question        The question to ask to the user
+     * @param bool   $default         The default answer to return, true or false
+     * @param string $trueAnswerRegex A regex to match the "yes" answer
+     */
+    public function __construct(string $question, bool $default = true, string $trueAnswerRegex = '/^y/i')
+    {
+        parent::__construct($question, $default);
+
+        $this->trueAnswerRegex = $trueAnswerRegex;
+        $this->setNormalizer($this->getDefaultNormalizer());
+    }
+
+    /**
+     * Returns the default answer normalizer.
+     */
+    private function getDefaultNormalizer(): callable
+    {
+        $default = $this->getDefault();
+        $regex = $this->trueAnswerRegex;
+
+        return function ($answer) use ($default, $regex) {
+            if (\is_bool($answer)) {
+                return $answer;
+            }
+
+            $answerIsTrue = (bool) preg_match($regex, $answer);
+            if (false === $default) {
+                return $answer && $answerIsTrue;
+            }
+
+            return '' === $answer || $answerIsTrue;
+        };
+    }
+}