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/polyfill-php80/PhpToken.php

@@ -0,0 +1,103 @@
+<?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\Polyfill\Php80;
+
+/**
+ * @author Fedonyuk Anton <info@ensostudio.ru>
+ *
+ * @internal
+ */
+class PhpToken implements \Stringable
+{
+    /**
+     * @var int
+     */
+    public $id;
+
+    /**
+     * @var string
+     */
+    public $text;
+
+    /**
+     * @var int
+     */
+    public $line;
+
+    /**
+     * @var int
+     */
+    public $pos;
+
+    public function __construct(int $id, string $text, int $line = -1, int $position = -1)
+    {
+        $this->id = $id;
+        $this->text = $text;
+        $this->line = $line;
+        $this->pos = $position;
+    }
+
+    public function getTokenName(): ?string
+    {
+        if ('UNKNOWN' === $name = token_name($this->id)) {
+            $name = \strlen($this->text) > 1 || \ord($this->text) < 32 ? null : $this->text;
+        }
+
+        return $name;
+    }
+
+    /**
+     * @param int|string|array $kind
+     */
+    public function is($kind): bool
+    {
+        foreach ((array) $kind as $value) {
+            if (\in_array($value, [$this->id, $this->text], true)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    public function isIgnorable(): bool
+    {
+        return \in_array($this->id, [\T_WHITESPACE, \T_COMMENT, \T_DOC_COMMENT, \T_OPEN_TAG], true);
+    }
+
+    public function __toString(): string
+    {
+        return (string) $this->text;
+    }
+
+    /**
+     * @return static[]
+     */
+    public static function tokenize(string $code, int $flags = 0): array
+    {
+        $line = 1;
+        $position = 0;
+        $tokens = token_get_all($code, $flags);
+        foreach ($tokens as $index => $token) {
+            if (\is_string($token)) {
+                $id = \ord($token);
+                $text = $token;
+            } else {
+                [$id, $text, $line] = $token;
+            }
+            $tokens[$index] = new static($id, $text, $line, $position);
+            $position += \strlen($text);
+        }
+
+        return $tokens;
+    }
+}