Fetch promotion

views/index.ejs

@@ -43,6 +43,14 @@
       // React.useEffect(() => {
       // }, [ready, error])
       
+      React.useEffect(() => {
+        axios.post('/get_promotion')
+        .then(result => {
+          setPromotionMin(result.data.promotion);
+          setPromotionMax(result.data.promotion);
+        })
+      }, [])
+      
       React.useEffect(() => {
         setReady(false);
         setError(false);