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/error-handler/BufferingLogger.php

@@ -0,0 +1,71 @@
+<?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\Component\ErrorHandler;
+
+use Psr\Log\AbstractLogger;
+
+/**
+ * A buffering logger that stacks logs for later.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class BufferingLogger extends AbstractLogger
+{
+    private array $logs = [];
+
+    public function log($level, $message, array $context = []): void
+    {
+        $this->logs[] = [$level, $message, $context];
+    }
+
+    public function cleanLogs(): array
+    {
+        $logs = $this->logs;
+        $this->logs = [];
+
+        return $logs;
+    }
+
+    public function __sleep(): array
+    {
+        throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
+    }
+
+    /**
+     * @return void
+     */
+    public function __wakeup()
+    {
+        throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
+    }
+
+    public function __destruct()
+    {
+        foreach ($this->logs as [$level, $message, $context]) {
+            if (str_contains($message, '{')) {
+                foreach ($context as $key => $val) {
+                    if (null === $val || \is_scalar($val) || (\is_object($val) && \is_callable([$val, '__toString']))) {
+                        $message = str_replace("{{$key}}", $val, $message);
+                    } elseif ($val instanceof \DateTimeInterface) {
+                        $message = str_replace("{{$key}}", $val->format(\DateTimeInterface::RFC3339), $message);
+                    } elseif (\is_object($val)) {
+                        $message = str_replace("{{$key}}", '[object '.get_debug_type($val).']', $message);
+                    } else {
+                        $message = str_replace("{{$key}}", '['.\gettype($val).']', $message);
+                    }
+                }
+            }
+
+            error_log(sprintf('%s [%s] %s', date(\DateTimeInterface::RFC3339), $level, $message));
+        }
+    }
+}