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/nette/schema/src/Schema/Expect.php

@@ -0,0 +1,108 @@
+<?php
+
+/**
+ * This file is part of the Nette Framework (https://nette.org)
+ * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
+ */
+
+declare(strict_types=1);
+
+namespace Nette\Schema;
+
+use Nette;
+use Nette\Schema\Elements\AnyOf;
+use Nette\Schema\Elements\Structure;
+use Nette\Schema\Elements\Type;
+
+
+/**
+ * Schema generator.
+ *
+ * @method static Type scalar($default = null)
+ * @method static Type string($default = null)
+ * @method static Type int($default = null)
+ * @method static Type float($default = null)
+ * @method static Type bool($default = null)
+ * @method static Type null()
+ * @method static Type array($default = [])
+ * @method static Type list($default = [])
+ * @method static Type mixed($default = null)
+ * @method static Type email($default = null)
+ * @method static Type unicode($default = null)
+ */
+final class Expect
+{
+	public static function __callStatic(string $name, array $args): Type
+	{
+		$type = new Type($name);
+		if ($args) {
+			$type->default($args[0]);
+		}
+
+		return $type;
+	}
+
+
+	public static function type(string $type): Type
+	{
+		return new Type($type);
+	}
+
+
+	public static function anyOf(mixed ...$set): AnyOf
+	{
+		return new AnyOf(...$set);
+	}
+
+
+	/**
+	 * @param  Schema[]  $items
+	 */
+	public static function structure(array $items): Structure
+	{
+		return new Structure($items);
+	}
+
+
+	public static function from(object $object, array $items = []): Structure
+	{
+		$ro = new \ReflectionObject($object);
+		$props = $ro->hasMethod('__construct')
+			? $ro->getMethod('__construct')->getParameters()
+			: $ro->getProperties();
+
+		foreach ($props as $prop) {
+			$item = &$items[$prop->getName()];
+			if (!$item) {
+				$type = Helpers::getPropertyType($prop) ?? 'mixed';
+				$item = new Type($type);
+				if ($prop instanceof \ReflectionProperty ? $prop->isInitialized($object) : $prop->isOptional()) {
+					$def = ($prop instanceof \ReflectionProperty ? $prop->getValue($object) : $prop->getDefaultValue());
+					if (is_object($def)) {
+						$item = static::from($def);
+					} elseif ($def === null && !Nette\Utils\Validators::is(null, $type)) {
+						$item->required();
+					} else {
+						$item->default($def);
+					}
+				} else {
+					$item->required();
+				}
+			}
+		}
+
+		return (new Structure($items))->castTo($ro->getName());
+	}
+
+
+	public static function arrayOf(string|Schema $valueType, string|Schema $keyType = null): Type
+	{
+		return (new Type('array'))->items($valueType, $keyType);
+	}
+
+
+	public static function listOf(string|Schema $type): Type
+	{
+		return (new Type('list'))->items($type);
+	}
+}