improve: add production stage

src/App.css

@@ -7,10 +7,11 @@
 .content-container {
     display: flex;
     flex: 1;
+    overflow: hidden;
 }
 
 .main-content {
     flex: 1;
-    padding: 1rem;
+    padding: 1rem 1rem 100px 1rem;
     overflow-y: auto;
 }