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/guzzlehttp/psr7/src/StreamWrapper.php

@@ -0,0 +1,203 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GuzzleHttp\Psr7;
+
+use Psr\Http\Message\StreamInterface;
+
+/**
+ * Converts Guzzle streams into PHP stream resources.
+ *
+ * @see https://www.php.net/streamwrapper
+ */
+final class StreamWrapper
+{
+    /** @var resource */
+    public $context;
+
+    /** @var StreamInterface */
+    private $stream;
+
+    /** @var string r, r+, or w */
+    private $mode;
+
+    /**
+     * Returns a resource representing the stream.
+     *
+     * @param StreamInterface $stream The stream to get a resource for
+     *
+     * @return resource
+     *
+     * @throws \InvalidArgumentException if stream is not readable or writable
+     */
+    public static function getResource(StreamInterface $stream)
+    {
+        self::register();
+
+        if ($stream->isReadable()) {
+            $mode = $stream->isWritable() ? 'r+' : 'r';
+        } elseif ($stream->isWritable()) {
+            $mode = 'w';
+        } else {
+            throw new \InvalidArgumentException('The stream must be readable, '
+                .'writable, or both.');
+        }
+
+        return fopen('guzzle://stream', $mode, false, self::createStreamContext($stream));
+    }
+
+    /**
+     * Creates a stream context that can be used to open a stream as a php stream resource.
+     *
+     * @return resource
+     */
+    public static function createStreamContext(StreamInterface $stream)
+    {
+        return stream_context_create([
+            'guzzle' => ['stream' => $stream],
+        ]);
+    }
+
+    /**
+     * Registers the stream wrapper if needed
+     */
+    public static function register(): void
+    {
+        if (!in_array('guzzle', stream_get_wrappers())) {
+            stream_wrapper_register('guzzle', __CLASS__);
+        }
+    }
+
+    public function stream_open(string $path, string $mode, int $options, string &$opened_path = null): bool
+    {
+        $options = stream_context_get_options($this->context);
+
+        if (!isset($options['guzzle']['stream'])) {
+            return false;
+        }
+
+        $this->mode = $mode;
+        $this->stream = $options['guzzle']['stream'];
+
+        return true;
+    }
+
+    public function stream_read(int $count): string
+    {
+        return $this->stream->read($count);
+    }
+
+    public function stream_write(string $data): int
+    {
+        return $this->stream->write($data);
+    }
+
+    public function stream_tell(): int
+    {
+        return $this->stream->tell();
+    }
+
+    public function stream_eof(): bool
+    {
+        return $this->stream->eof();
+    }
+
+    public function stream_seek(int $offset, int $whence): bool
+    {
+        $this->stream->seek($offset, $whence);
+
+        return true;
+    }
+
+    /**
+     * @return resource|false
+     */
+    public function stream_cast(int $cast_as)
+    {
+        $stream = clone $this->stream;
+        $resource = $stream->detach();
+
+        return $resource ?? false;
+    }
+
+    /**
+     * @return array{
+     *   dev: int,
+     *   ino: int,
+     *   mode: int,
+     *   nlink: int,
+     *   uid: int,
+     *   gid: int,
+     *   rdev: int,
+     *   size: int,
+     *   atime: int,
+     *   mtime: int,
+     *   ctime: int,
+     *   blksize: int,
+     *   blocks: int
+     * }
+     */
+    public function stream_stat(): array
+    {
+        static $modeMap = [
+            'r' => 33060,
+            'rb' => 33060,
+            'r+' => 33206,
+            'w' => 33188,
+            'wb' => 33188,
+        ];
+
+        return [
+            'dev' => 0,
+            'ino' => 0,
+            'mode' => $modeMap[$this->mode],
+            'nlink' => 0,
+            'uid' => 0,
+            'gid' => 0,
+            'rdev' => 0,
+            'size' => $this->stream->getSize() ?: 0,
+            'atime' => 0,
+            'mtime' => 0,
+            'ctime' => 0,
+            'blksize' => 0,
+            'blocks' => 0,
+        ];
+    }
+
+    /**
+     * @return array{
+     *   dev: int,
+     *   ino: int,
+     *   mode: int,
+     *   nlink: int,
+     *   uid: int,
+     *   gid: int,
+     *   rdev: int,
+     *   size: int,
+     *   atime: int,
+     *   mtime: int,
+     *   ctime: int,
+     *   blksize: int,
+     *   blocks: int
+     * }
+     */
+    public function url_stat(string $path, int $flags): array
+    {
+        return [
+            'dev' => 0,
+            'ino' => 0,
+            'mode' => 0,
+            'nlink' => 0,
+            'uid' => 0,
+            'gid' => 0,
+            'rdev' => 0,
+            'size' => 0,
+            'atime' => 0,
+            'mtime' => 0,
+            'ctime' => 0,
+            'blksize' => 0,
+            'blocks' => 0,
+        ];
+    }
+}