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/Helper/HelperSet.php

@@ -0,0 +1,77 @@
+<?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\Helper;
+
+use Symfony\Component\Console\Exception\InvalidArgumentException;
+
+/**
+ * HelperSet represents a set of helpers to be used with a command.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @implements \IteratorAggregate<string, HelperInterface>
+ */
+class HelperSet implements \IteratorAggregate
+{
+    /** @var array<string, HelperInterface> */
+    private array $helpers = [];
+
+    /**
+     * @param HelperInterface[] $helpers
+     */
+    public function __construct(array $helpers = [])
+    {
+        foreach ($helpers as $alias => $helper) {
+            $this->set($helper, \is_int($alias) ? null : $alias);
+        }
+    }
+
+    /**
+     * @return void
+     */
+    public function set(HelperInterface $helper, ?string $alias = null)
+    {
+        $this->helpers[$helper->getName()] = $helper;
+        if (null !== $alias) {
+            $this->helpers[$alias] = $helper;
+        }
+
+        $helper->setHelperSet($this);
+    }
+
+    /**
+     * Returns true if the helper if defined.
+     */
+    public function has(string $name): bool
+    {
+        return isset($this->helpers[$name]);
+    }
+
+    /**
+     * Gets a helper value.
+     *
+     * @throws InvalidArgumentException if the helper is not defined
+     */
+    public function get(string $name): HelperInterface
+    {
+        if (!$this->has($name)) {
+            throw new InvalidArgumentException(sprintf('The helper "%s" is not defined.', $name));
+        }
+
+        return $this->helpers[$name];
+    }
+
+    public function getIterator(): \Traversable
+    {
+        return new \ArrayIterator($this->helpers);
+    }
+}