Refactoring and cleanup

* Moved logic from entrypoint to a dedicated class.
* Disabled automatic flush of state.
* Added locking support to prevent multiple instances.
* Added logging
* Added base interface for CredentialsLoader

src/Configuration/ComposeConfiguration.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace NoccyLabs\FreshDocker\Configuration;
+
+use Symfony\Component\Yaml\Yaml;
+
+class ComposeConfiguration
+{
+
+    private array $checks = [];
+
+    public function __construct(string $configfile)
+    {
+        $this->loadComposeFile($configfile);
+    }
+
+    private function loadComposeFile($configfile)
+    {
+        $config = Yaml::parseFile($configfile);
+        $services = $config['services']??[];
+        foreach ($services as $name=>$service) {
+            $image = $service['image']??null;
+            if ($image && !in_array($image,$this->checks)) {
+                $this->checks[] = $image;
+            }
+        }
+    }
+
+    public function getChecks(): array
+    {
+        return $this->checks;
+    }
+}