add simple reviews endpoint with app, composer deps and dockerfile

Author: Florian Engelhardt

reviews/Dockerfile

@@ -0,0 +1,6 @@
+FROM php:7.3-alpine
+WORKDIR /app
+ENV PORT=3000
+COPY . .
+EXPOSE $PORT
+ENTRYPOINT ["php", "app.php"]

reviews/app.php

@@ -0,0 +1,30 @@
+<?php
+declare(strict_types=1);
+
+use Psr\Http\Message\ServerRequestInterface;
+use React\EventLoop\Factory;
+use React\Http\Response;
+use React\Http\Server;
+
+require __DIR__ . '/vendor/autoload.php';
+
+$loop = Factory::create();
+$server = new Server(function (ServerRequestInterface $request) {
+    return new Response(
+        200,
+        array(
+            'Content-Type' => 'application/json'
+        ),
+        json_encode([
+            'id' => 2,
+            'title' => 'Oh snap what an ending',
+            'grade' => 5,
+            'comment' => 'I need therapy after this...',
+            'product' => 1
+        ])
+    );
+});
+$socket = new \React\Socket\Server('0.0.0.0:3000', $loop);
+$server->listen($socket);
+echo 'Listening on ' . str_replace('tcp:', 'http:', $socket->getAddress()) . PHP_EOL;
+$loop->run();

reviews/composer.json

@@ -0,0 +1,5 @@
+{
+    "require": {
+        "react/http": "^0.8.4"
+    }
+}