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/guzzlehttp/psr7/src/NoSeekStream.php

@@ -1,28 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace GuzzleHttp\Psr7;
-
-use Psr\Http\Message\StreamInterface;
-
-/**
- * Stream decorator that prevents a stream from being seeked.
- */
-final class NoSeekStream implements StreamInterface
-{
-    use StreamDecoratorTrait;
-
-    /** @var StreamInterface */
-    private $stream;
-
-    public function seek($offset, $whence = SEEK_SET): void
-    {
-        throw new \RuntimeException('Cannot seek a NoSeekStream');
-    }
-
-    public function isSeekable(): bool
-    {
-        return false;
-    }
-}