Import latest app updates from streamline

An updated set of source files and initialization was provided by streamline to
address issues observed during initial testing. These files have been updated in
order to generate a new set of app images.

docker/streamline-src/vendor/league/flysystem/src/UnableToDeleteFile.php

@@ -1,45 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace League\Flysystem;
-
-use RuntimeException;
-use Throwable;
-
-final class UnableToDeleteFile extends RuntimeException implements FilesystemOperationFailed
-{
-    /**
-     * @var string
-     */
-    private $location = '';
-
-    /**
-     * @var string
-     */
-    private $reason;
-
-    public static function atLocation(string $location, string $reason = '', Throwable $previous = null): UnableToDeleteFile
-    {
-        $e = new static(rtrim("Unable to delete file located at: {$location}. {$reason}"), 0, $previous);
-        $e->location = $location;
-        $e->reason = $reason;
-
-        return $e;
-    }
-
-    public function operation(): string
-    {
-        return FilesystemOperationFailed::OPERATION_DELETE;
-    }
-
-    public function reason(): string
-    {
-        return $this->reason;
-    }
-
-    public function location(): string
-    {
-        return $this->location;
-    }
-}