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/Requirement/EnumRequirement.php

@@ -0,0 +1,56 @@
+<?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\Requirement;
+
+use Symfony\Component\Routing\Exception\InvalidArgumentException;
+
+final class EnumRequirement implements \Stringable
+{
+    private string $requirement;
+
+    /**
+     * @template T of \BackedEnum
+     *
+     * @param class-string<T>|list<T> $cases
+     */
+    public function __construct(string|array $cases = [])
+    {
+        if (\is_string($cases)) {
+            if (!is_subclass_of($cases, \BackedEnum::class, true)) {
+                throw new InvalidArgumentException(sprintf('"%s" is not a "BackedEnum" class.', $cases));
+            }
+
+            $cases = $cases::cases();
+        } else {
+            $class = null;
+
+            foreach ($cases as $case) {
+                if (!$case instanceof \BackedEnum) {
+                    throw new InvalidArgumentException(sprintf('Case must be a "BackedEnum" instance, "%s" given.', get_debug_type($case)));
+                }
+
+                $class ??= $case::class;
+
+                if (!$case instanceof $class) {
+                    throw new InvalidArgumentException(sprintf('"%s::%s" is not a case of "%s".', get_debug_type($case), $case->name, $class));
+                }
+            }
+        }
+
+        $this->requirement = implode('|', array_map(static fn ($e) => preg_quote($e->value), $cases));
+    }
+
+    public function __toString(): string
+    {
+        return $this->requirement;
+    }
+}

docker/streamline-src/vendor/symfony/routing/Requirement/Requirement.php

@@ -0,0 +1,36 @@
+<?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\Requirement;
+
+/*
+ * A collection of universal regular-expression constants to use as route parameter requirements.
+ */
+enum Requirement
+{
+    public const ASCII_SLUG = '[A-Za-z0-9]+(?:-[A-Za-z0-9]+)*'; // symfony/string AsciiSlugger default implementation
+    public const CATCH_ALL = '.+';
+    public const DATE_YMD = '[0-9]{4}-(?:0[1-9]|1[012])-(?:0[1-9]|[12][0-9]|(?<!02-)3[01])'; // YYYY-MM-DD
+    public const DIGITS = '[0-9]+';
+    public const POSITIVE_INT = '[1-9][0-9]*';
+    public const UID_BASE32 = '[0-9A-HJKMNP-TV-Z]{26}';
+    public const UID_BASE58 = '[1-9A-HJ-NP-Za-km-z]{22}';
+    public const UID_RFC4122 = '[0-9a-f]{8}(?:-[0-9a-f]{4}){3}-[0-9a-f]{12}';
+    public const ULID = '[0-7][0-9A-HJKMNP-TV-Z]{25}';
+    public const UUID = '[0-9a-f]{8}-[0-9a-f]{4}-[13-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}';
+    public const UUID_V1 = '[0-9a-f]{8}-[0-9a-f]{4}-1[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}';
+    public const UUID_V3 = '[0-9a-f]{8}-[0-9a-f]{4}-3[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}';
+    public const UUID_V4 = '[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}';
+    public const UUID_V5 = '[0-9a-f]{8}-[0-9a-f]{4}-5[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}';
+    public const UUID_V6 = '[0-9a-f]{8}-[0-9a-f]{4}-6[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}';
+    public const UUID_V7 = '[0-9a-f]{8}-[0-9a-f]{4}-7[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}';
+    public const UUID_V8 = '[0-9a-f]{8}-[0-9a-f]{4}-8[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}';
+}