Add trending config

config/trending.php

@@ -0,0 +1,9 @@
+<?php
+
+return [
+    'hashtags' => [
+        'ttl' => env('PF_HASHTAGS_TRENDING_TTL', 43200),
+        'recency_mins' => env('PF_HASHTAGS_TRENDING_RECENCY_MINS', 20160),
+        'limit' => env('PF_HASHTAGS_TRENDING_LIMIT', 20)
+    ]
+];