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/nikic/php-parser/lib/PhpParser/JsonDecoder.php

@@ -0,0 +1,108 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser;
+
+class JsonDecoder {
+    /** @var \ReflectionClass<Node>[] Node type to reflection class map */
+    private array $reflectionClassCache;
+
+    /** @return mixed */
+    public function decode(string $json) {
+        $value = json_decode($json, true);
+        if (json_last_error()) {
+            throw new \RuntimeException('JSON decoding error: ' . json_last_error_msg());
+        }
+
+        return $this->decodeRecursive($value);
+    }
+
+    /**
+     * @param mixed $value
+     * @return mixed
+     */
+    private function decodeRecursive($value) {
+        if (\is_array($value)) {
+            if (isset($value['nodeType'])) {
+                if ($value['nodeType'] === 'Comment' || $value['nodeType'] === 'Comment_Doc') {
+                    return $this->decodeComment($value);
+                }
+                return $this->decodeNode($value);
+            }
+            return $this->decodeArray($value);
+        }
+        return $value;
+    }
+
+    private function decodeArray(array $array): array {
+        $decodedArray = [];
+        foreach ($array as $key => $value) {
+            $decodedArray[$key] = $this->decodeRecursive($value);
+        }
+        return $decodedArray;
+    }
+
+    private function decodeNode(array $value): Node {
+        $nodeType = $value['nodeType'];
+        if (!\is_string($nodeType)) {
+            throw new \RuntimeException('Node type must be a string');
+        }
+
+        $reflectionClass = $this->reflectionClassFromNodeType($nodeType);
+        $node = $reflectionClass->newInstanceWithoutConstructor();
+
+        if (isset($value['attributes'])) {
+            if (!\is_array($value['attributes'])) {
+                throw new \RuntimeException('Attributes must be an array');
+            }
+
+            $node->setAttributes($this->decodeArray($value['attributes']));
+        }
+
+        foreach ($value as $name => $subNode) {
+            if ($name === 'nodeType' || $name === 'attributes') {
+                continue;
+            }
+
+            $node->$name = $this->decodeRecursive($subNode);
+        }
+
+        return $node;
+    }
+
+    private function decodeComment(array $value): Comment {
+        $className = $value['nodeType'] === 'Comment' ? Comment::class : Comment\Doc::class;
+        if (!isset($value['text'])) {
+            throw new \RuntimeException('Comment must have text');
+        }
+
+        return new $className(
+            $value['text'],
+            $value['line'] ?? -1, $value['filePos'] ?? -1, $value['tokenPos'] ?? -1,
+            $value['endLine'] ?? -1, $value['endFilePos'] ?? -1, $value['endTokenPos'] ?? -1
+        );
+    }
+
+    /** @return \ReflectionClass<Node> */
+    private function reflectionClassFromNodeType(string $nodeType): \ReflectionClass {
+        if (!isset($this->reflectionClassCache[$nodeType])) {
+            $className = $this->classNameFromNodeType($nodeType);
+            $this->reflectionClassCache[$nodeType] = new \ReflectionClass($className);
+        }
+        return $this->reflectionClassCache[$nodeType];
+    }
+
+    /** @return class-string<Node> */
+    private function classNameFromNodeType(string $nodeType): string {
+        $className = 'PhpParser\\Node\\' . strtr($nodeType, '_', '\\');
+        if (class_exists($className)) {
+            return $className;
+        }
+
+        $className .= '_';
+        if (class_exists($className)) {
+            return $className;
+        }
+
+        throw new \RuntimeException("Unknown node type \"$nodeType\"");
+    }
+}