Webhook support, misc fixes

* Added support for slack (mattermost) webhooks
* Misc fixes

src/Hooks/HookInterface.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace NoccyLabs\FreshDocker\Hooks;
+
+use GuzzleHttp\Client;
+use RuntimeException;
+
+interface HookInterface
+{
+
+    public function sendMessage(string $text, array $options);
+
+}

src/Hooks/SlackHook.php

@@ -5,7 +5,7 @@ namespace NoccyLabs\FreshDocker\Hooks;
 use GuzzleHttp\Client;
 use RuntimeException;
 
-class SlackHook
+class SlackHook implements HookInterface
 {
 
     private array $options = [];
@@ -49,6 +49,10 @@ class SlackHook
         if (array_key_exists('channel', $options)) $body['channel'] = $options['channel'];
         if (array_key_exists('username', $options)) $body['username'] = $options['username'];
         if (array_key_exists('icon_url', $options)) $body['icon_url'] = $options['icon_url'];
+        if (array_key_exists('info', $options)) {
+            if (!array_key_exists('props', $body)) $body['props'] = [];
+            $body['props']['card'] = $options['info'];
+        }
         $body['text'] = $text;
 
         return $body;