Add boilerplate code, Docker environment, Makefile etc.

public/.htaccess

@@ -0,0 +1,4 @@
+RewriteEngine On
+RewriteCond %{REQUEST_FILENAME} !-f
+RewriteCond %{REQUEST_FILENAME} !-d
+RewriteRule ^ index.php [QSA,L]

public/index.php

@@ -0,0 +1,19 @@
+<?php
+declare(strict_types=1);
+
+require_once __DIR__ . '/../vendor/autoload.php';
+
+use MailAccountAdmin\Dependencies;
+use MailAccountAdmin\Middlewares;
+use MailAccountAdmin\Routes;
+use MailAccountAdmin\Settings;
+use Slim\Factory\AppFactory;
+
+$settings = new Settings();
+$container = Dependencies::createContainer($settings);
+$app = AppFactory::createFromContainer($container);
+
+Middlewares::setMiddlewares($app);
+Routes::setRoutes($app);
+
+$app->run();