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/utils/src/SmartObject.php

@@ -0,0 +1,140 @@
+<?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;
+
+use Nette\Utils\ObjectHelpers;
+
+
+/**
+ * Strict class for better experience.
+ * - 'did you mean' hints
+ * - access to undeclared members throws exceptions
+ * - support for @property annotations
+ * - support for calling event handlers stored in $onEvent via onEvent()
+ */
+trait SmartObject
+{
+	/**
+	 * @return mixed
+	 * @throws MemberAccessException
+	 */
+	public function __call(string $name, array $args)
+	{
+		$class = static::class;
+
+		if (ObjectHelpers::hasProperty($class, $name) === 'event') { // calling event handlers
+			$handlers = $this->$name ?? null;
+			if (is_iterable($handlers)) {
+				foreach ($handlers as $handler) {
+					$handler(...$args);
+				}
+			} elseif ($handlers !== null) {
+				throw new UnexpectedValueException("Property $class::$$name must be iterable or null, " . get_debug_type($handlers) . ' given.');
+			}
+
+			return null;
+		}
+
+		ObjectHelpers::strictCall($class, $name);
+	}
+
+
+	/**
+	 * @throws MemberAccessException
+	 */
+	public static function __callStatic(string $name, array $args)
+	{
+		ObjectHelpers::strictStaticCall(static::class, $name);
+	}
+
+
+	/**
+	 * @return mixed
+	 * @throws MemberAccessException if the property is not defined.
+	 */
+	public function &__get(string $name)
+	{
+		$class = static::class;
+
+		if ($prop = ObjectHelpers::getMagicProperties($class)[$name] ?? null) { // property getter
+			if (!($prop & 0b0001)) {
+				throw new MemberAccessException("Cannot read a write-only property $class::\$$name.");
+			}
+
+			$m = ($prop & 0b0010 ? 'get' : 'is') . ucfirst($name);
+			if ($prop & 0b10000) {
+				$trace = debug_backtrace(0, 1)[0]; // suppose this method is called from __call()
+				$loc = isset($trace['file'], $trace['line'])
+					? " in $trace[file] on line $trace[line]"
+					: '';
+				trigger_error("Property $class::\$$name is deprecated, use $class::$m() method$loc.", E_USER_DEPRECATED);
+			}
+
+			if ($prop & 0b0100) { // return by reference
+				return $this->$m();
+			} else {
+				$val = $this->$m();
+				return $val;
+			}
+		} else {
+			ObjectHelpers::strictGet($class, $name);
+		}
+	}
+
+
+	/**
+	 * @throws MemberAccessException if the property is not defined or is read-only
+	 */
+	public function __set(string $name, mixed $value): void
+	{
+		$class = static::class;
+
+		if (ObjectHelpers::hasProperty($class, $name)) { // unsetted property
+			$this->$name = $value;
+
+		} elseif ($prop = ObjectHelpers::getMagicProperties($class)[$name] ?? null) { // property setter
+			if (!($prop & 0b1000)) {
+				throw new MemberAccessException("Cannot write to a read-only property $class::\$$name.");
+			}
+
+			$m = 'set' . ucfirst($name);
+			if ($prop & 0b10000) {
+				$trace = debug_backtrace(0, 1)[0]; // suppose this method is called from __call()
+				$loc = isset($trace['file'], $trace['line'])
+					? " in $trace[file] on line $trace[line]"
+					: '';
+				trigger_error("Property $class::\$$name is deprecated, use $class::$m() method$loc.", E_USER_DEPRECATED);
+			}
+
+			$this->$m($value);
+
+		} else {
+			ObjectHelpers::strictSet($class, $name);
+		}
+	}
+
+
+	/**
+	 * @throws MemberAccessException
+	 */
+	public function __unset(string $name): void
+	{
+		$class = static::class;
+		if (!ObjectHelpers::hasProperty($class, $name)) {
+			throw new MemberAccessException("Cannot unset the property $class::\$$name.");
+		}
+	}
+
+
+	public function __isset(string $name): bool
+	{
+		return isset(ObjectHelpers::getMagicProperties(static::class)[$name]);
+	}
+}