add functions, create and join room

src/Loading.js

@@ -0,0 +1,10 @@
+import React from 'react';
+import { LoadingOutlined } from '@ant-design/icons';
+
+const Loading = () => (
+  <div id="loading_container">
+    <LoadingOutlined />
+  </div>
+);
+
+export default Loading;