Added logging.

src/App.php

@@ -0,0 +1,36 @@
+<?php
+namespace App;
+
+use Symfony\Component\Yaml\Yaml;
+use Symfony\Component\Yaml\Exception\ParseException;
+
+use Monolog\Logger;
+use Monolog\Handler\StreamHandler;
+
+
+class App {
+    protected Logger $logger;
+    protected array $config;
+
+    function __construct(string $configFile)
+    {
+        $this->config = Yaml::parseFile($configFile);
+        
+        $logger = new Logger('app');
+        $logger->pushHandler(new StreamHandler($this->getConfig()['logging']['stream']));
+        $logger->info("Initialization complete");
+
+        $this->logger = $logger;
+    }
+
+ 
+    function getConfig() : array
+    {
+        return $this->config;
+    }
+
+    function getLogger() : Logger
+    {
+        return $this->logger;
+    }
+}