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/Message.php

@@ -0,0 +1,98 @@
+<?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;
+
+
+final class Message
+{
+	/** variables: {value: mixed, expected: string} */
+	public const TypeMismatch = 'schema.typeMismatch';
+
+	/** variables: {value: mixed, expected: string} */
+	public const ValueOutOfRange = 'schema.valueOutOfRange';
+
+	/** variables: {value: mixed, length: int, expected: string} */
+	public const LengthOutOfRange = 'schema.lengthOutOfRange';
+
+	/** variables: {value: string, pattern: string} */
+	public const PatternMismatch = 'schema.patternMismatch';
+
+	/** variables: {value: mixed, assertion: string} */
+	public const FailedAssertion = 'schema.failedAssertion';
+
+	/** no variables */
+	public const MissingItem = 'schema.missingItem';
+
+	/** variables: {hint: string} */
+	public const UnexpectedItem = 'schema.unexpectedItem';
+
+	/** no variables */
+	public const Deprecated = 'schema.deprecated';
+
+	/** @deprecated use Message::TypeMismatch */
+	public const TYPE_MISMATCH = self::TypeMismatch;
+
+	/** @deprecated use Message::ValueOutOfRange */
+	public const VALUE_OUT_OF_RANGE = self::ValueOutOfRange;
+
+	/** @deprecated use Message::LengthOutOfRange */
+	public const LENGTH_OUT_OF_RANGE = self::LengthOutOfRange;
+
+	/** @deprecated use Message::PatternMismatch */
+	public const PATTERN_MISMATCH = self::PatternMismatch;
+
+	/** @deprecated use Message::FailedAssertion */
+	public const FAILED_ASSERTION = self::FailedAssertion;
+
+	/** @deprecated use Message::MissingItem */
+	public const MISSING_ITEM = self::MissingItem;
+
+	/** @deprecated use Message::UnexpectedItem */
+	public const UNEXPECTED_ITEM = self::UnexpectedItem;
+
+	/** @deprecated use Message::Deprecated */
+	public const DEPRECATED = self::Deprecated;
+
+	public string $message;
+	public string $code;
+
+	/** @var string[] */
+	public array $path;
+
+	/** @var string[] */
+	public array $variables;
+
+
+	public function __construct(string $message, string $code, array $path, array $variables = [])
+	{
+		$this->message = $message;
+		$this->code = $code;
+		$this->path = $path;
+		$this->variables = $variables;
+	}
+
+
+	public function toString(): string
+	{
+		$vars = $this->variables;
+		$vars['label'] = empty($vars['isKey']) ? 'item' : 'key of item';
+		$vars['path'] = $this->path
+			? "'" . implode("\u{a0}›\u{a0}", $this->path) . "'"
+			: null;
+		$vars['value'] = Helpers::formatValue($vars['value'] ?? null);
+
+		return preg_replace_callback('~( ?)%(\w+)%~', function ($m) use ($vars) {
+			[, $space, $key] = $m;
+			return $vars[$key] === null ? '' : $space . $vars[$key];
+		}, $this->message) ?? throw new Nette\InvalidStateException(preg_last_error_msg());
+	}
+}