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/routing/Loader/ObjectLoader.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\Routing\Loader;
+
+use Symfony\Component\Config\Loader\Loader;
+use Symfony\Component\Config\Resource\FileResource;
+use Symfony\Component\Routing\RouteCollection;
+
+/**
+ * A route loader that calls a method on an object to load the routes.
+ *
+ * @author Ryan Weaver <ryan@knpuniversity.com>
+ */
+abstract class ObjectLoader extends Loader
+{
+    /**
+     * Returns the object that the method will be called on to load routes.
+     *
+     * For example, if your application uses a service container,
+     * the $id may be a service id.
+     */
+    abstract protected function getObject(string $id): object;
+
+    /**
+     * Calls the object method that will load the routes.
+     */
+    public function load(mixed $resource, ?string $type = null): RouteCollection
+    {
+        if (!preg_match('/^[^\:]+(?:::(?:[^\:]+))?$/', $resource)) {
+            throw new \InvalidArgumentException(sprintf('Invalid resource "%s" passed to the %s route loader: use the format "object_id::method" or "object_id" if your object class has an "__invoke" method.', $resource, \is_string($type) ? '"'.$type.'"' : 'object'));
+        }
+
+        $parts = explode('::', $resource);
+        $method = $parts[1] ?? '__invoke';
+
+        $loaderObject = $this->getObject($parts[0]);
+
+        if (!\is_object($loaderObject)) {
+            throw new \TypeError(sprintf('"%s:getObject()" must return an object: "%s" returned.', static::class, get_debug_type($loaderObject)));
+        }
+
+        if (!\is_callable([$loaderObject, $method])) {
+            throw new \BadMethodCallException(sprintf('Method "%s" not found on "%s" when importing routing resource "%s".', $method, get_debug_type($loaderObject), $resource));
+        }
+
+        $routeCollection = $loaderObject->$method($this, $this->env);
+
+        if (!$routeCollection instanceof RouteCollection) {
+            $type = get_debug_type($routeCollection);
+
+            throw new \LogicException(sprintf('The "%s::%s()" method must return a RouteCollection: "%s" returned.', get_debug_type($loaderObject), $method, $type));
+        }
+
+        // make the object file tracked so that if it changes, the cache rebuilds
+        $this->addClassResource(new \ReflectionClass($loaderObject), $routeCollection);
+
+        return $routeCollection;
+    }
+
+    private function addClassResource(\ReflectionClass $class, RouteCollection $collection): void
+    {
+        do {
+            if (is_file($class->getFileName())) {
+                $collection->addResource(new FileResource($class->getFileName()));
+            }
+        } while ($class = $class->getParentClass());
+    }
+}