Send message only on stream start

app/Http/Controllers/WebhookController.php

@@ -197,7 +197,7 @@ class WebhookController extends Controller
             $twitchWebhook->save();
         }
 
-        if ($twitchWebhook->webhookActions) {
+        if ($eventType === "start" && $twitchWebhook->webhookActions) {
             // TODO: move this (generation of the message embed) to a separate method
             $userInfo = Twitch::getUserById(intval($data["user_id"]))->data[0];
             $gameInfo = null;