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/deprecation-contracts/function.php

@@ -0,0 +1,27 @@
+<?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.
+ */
+
+if (!function_exists('trigger_deprecation')) {
+    /**
+     * Triggers a silenced deprecation notice.
+     *
+     * @param string $package The name of the Composer package that is triggering the deprecation
+     * @param string $version The version of the package that introduced the deprecation
+     * @param string $message The message of the deprecation
+     * @param mixed  ...$args Values to insert in the message using printf() formatting
+     *
+     * @author Nicolas Grekas <p@tchwork.com>
+     */
+    function trigger_deprecation(string $package, string $version, string $message, mixed ...$args): void
+    {
+        @trigger_error(($package || $version ? "Since $package $version: " : '').($args ? vsprintf($message, $args) : $message), \E_USER_DEPRECATED);
+    }
+}