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/vlucas/phpdotenv/src/Util/Regex.php

@@ -0,0 +1,112 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Dotenv\Util;
+
+use GrahamCampbell\ResultType\Error;
+use GrahamCampbell\ResultType\Success;
+
+/**
+ * @internal
+ */
+final class Regex
+{
+    /**
+     * This class is a singleton.
+     *
+     * @codeCoverageIgnore
+     *
+     * @return void
+     */
+    private function __construct()
+    {
+        //
+    }
+
+    /**
+     * Perform a preg match, wrapping up the result.
+     *
+     * @param string $pattern
+     * @param string $subject
+     *
+     * @return \GrahamCampbell\ResultType\Result<bool,string>
+     */
+    public static function matches(string $pattern, string $subject)
+    {
+        return self::pregAndWrap(static function (string $subject) use ($pattern) {
+            return @\preg_match($pattern, $subject) === 1;
+        }, $subject);
+    }
+
+    /**
+     * Perform a preg match all, wrapping up the result.
+     *
+     * @param string $pattern
+     * @param string $subject
+     *
+     * @return \GrahamCampbell\ResultType\Result<int,string>
+     */
+    public static function occurrences(string $pattern, string $subject)
+    {
+        return self::pregAndWrap(static function (string $subject) use ($pattern) {
+            return (int) @\preg_match_all($pattern, $subject);
+        }, $subject);
+    }
+
+    /**
+     * Perform a preg replace callback, wrapping up the result.
+     *
+     * @param string   $pattern
+     * @param callable $callback
+     * @param string   $subject
+     * @param int|null $limit
+     *
+     * @return \GrahamCampbell\ResultType\Result<string,string>
+     */
+    public static function replaceCallback(string $pattern, callable $callback, string $subject, int $limit = null)
+    {
+        return self::pregAndWrap(static function (string $subject) use ($pattern, $callback, $limit) {
+            return (string) @\preg_replace_callback($pattern, $callback, $subject, $limit ?? -1);
+        }, $subject);
+    }
+
+    /**
+     * Perform a preg split, wrapping up the result.
+     *
+     * @param string $pattern
+     * @param string $subject
+     *
+     * @return \GrahamCampbell\ResultType\Result<string[],string>
+     */
+    public static function split(string $pattern, string $subject)
+    {
+        return self::pregAndWrap(static function (string $subject) use ($pattern) {
+            /** @var string[] */
+            return (array) @\preg_split($pattern, $subject);
+        }, $subject);
+    }
+
+    /**
+     * Perform a preg operation, wrapping up the result.
+     *
+     * @template V
+     *
+     * @param callable(string):V $operation
+     * @param string             $subject
+     *
+     * @return \GrahamCampbell\ResultType\Result<V,string>
+     */
+    private static function pregAndWrap(callable $operation, string $subject)
+    {
+        $result = $operation($subject);
+
+        if (\preg_last_error() !== \PREG_NO_ERROR) {
+            /** @var \GrahamCampbell\ResultType\Result<V,string> */
+            return Error::create(\preg_last_error_msg());
+        }
+
+        /** @var \GrahamCampbell\ResultType\Result<V,string> */
+        return Success::create($result);
+    }
+}