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/http-foundation/RateLimiter/AbstractRequestRateLimiter.php

@@ -0,0 +1,81 @@
+<?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\HttpFoundation\RateLimiter;
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\RateLimiter\LimiterInterface;
+use Symfony\Component\RateLimiter\Policy\NoLimiter;
+use Symfony\Component\RateLimiter\RateLimit;
+
+/**
+ * An implementation of PeekableRequestRateLimiterInterface that
+ * fits most use-cases.
+ *
+ * @author Wouter de Jong <wouter@wouterj.nl>
+ */
+abstract class AbstractRequestRateLimiter implements PeekableRequestRateLimiterInterface
+{
+    public function consume(Request $request): RateLimit
+    {
+        return $this->doConsume($request, 1);
+    }
+
+    public function peek(Request $request): RateLimit
+    {
+        return $this->doConsume($request, 0);
+    }
+
+    private function doConsume(Request $request, int $tokens): RateLimit
+    {
+        $limiters = $this->getLimiters($request);
+        if (0 === \count($limiters)) {
+            $limiters = [new NoLimiter()];
+        }
+
+        $minimalRateLimit = null;
+        foreach ($limiters as $limiter) {
+            $rateLimit = $limiter->consume($tokens);
+
+            $minimalRateLimit = $minimalRateLimit ? self::getMinimalRateLimit($minimalRateLimit, $rateLimit) : $rateLimit;
+        }
+
+        return $minimalRateLimit;
+    }
+
+    public function reset(Request $request): void
+    {
+        foreach ($this->getLimiters($request) as $limiter) {
+            $limiter->reset();
+        }
+    }
+
+    /**
+     * @return LimiterInterface[] a set of limiters using keys extracted from the request
+     */
+    abstract protected function getLimiters(Request $request): array;
+
+    private static function getMinimalRateLimit(RateLimit $first, RateLimit $second): RateLimit
+    {
+        if ($first->isAccepted() !== $second->isAccepted()) {
+            return $first->isAccepted() ? $second : $first;
+        }
+
+        $firstRemainingTokens = $first->getRemainingTokens();
+        $secondRemainingTokens = $second->getRemainingTokens();
+
+        if ($firstRemainingTokens === $secondRemainingTokens) {
+            return $first->getRetryAfter() < $second->getRetryAfter() ? $second : $first;
+        }
+
+        return $firstRemainingTokens > $secondRemainingTokens ? $second : $first;
+    }
+}

docker/streamline-src/vendor/symfony/http-foundation/RateLimiter/PeekableRequestRateLimiterInterface.php

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+<?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\HttpFoundation\RateLimiter;
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\RateLimiter\RateLimit;
+
+/**
+ * A request limiter which allows peeking ahead.
+ *
+ * This is valuable to reduce the cache backend load in scenarios
+ * like a login when we only want to consume a token on login failure,
+ * and where the majority of requests will be successful and thus not
+ * need to consume a token.
+ *
+ * This way we can peek ahead before allowing the request through, and
+ * only consume if the request failed (1 backend op). This is compared
+ * to always consuming and then resetting the limit if the request
+ * is successful (2 backend ops).
+ *
+ * @author Jordi Boggiano <j.boggiano@seld.be>
+ */
+interface PeekableRequestRateLimiterInterface extends RequestRateLimiterInterface
+{
+    public function peek(Request $request): RateLimit;
+}

docker/streamline-src/vendor/symfony/http-foundation/RateLimiter/RequestRateLimiterInterface.php

@@ -0,0 +1,30 @@
+<?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\HttpFoundation\RateLimiter;
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\RateLimiter\RateLimit;
+
+/**
+ * A special type of limiter that deals with requests.
+ *
+ * This allows to limit on different types of information
+ * from the requests.
+ *
+ * @author Wouter de Jong <wouter@wouterj.nl>
+ */
+interface RequestRateLimiterInterface
+{
+    public function consume(Request $request): RateLimit;
+
+    public function reset(Request $request): void;
+}