update: setup trainer in home page

src/home/gym/index.php

@@ -89,6 +89,13 @@ $gym = GymService::getInstance()->getById($gym_id);
             </div>
             <div class="space"></div>
             <div class="space"></div>
+            <div class="gym-attribute">List of trainers in this gym:</div>
+            <div class="gym-card-container" id="gym-trainer-list">
+                <div class="space"></div>
+                Loading...
+                <div class="space"></div>
+            </div>
+            <div class="space"></div>
 
             <div id="rate-section">
                 <div class="gym-attribute">

src/public/javascript/gym/trainer.js

+function getTrainer(){
+    
+}
\ No newline at end of file