feat: use hashRouter to be compatible with gh-pages

Author: RyanLiu0235

src/components/App.jsx

@@ -2,7 +2,7 @@ import React, {
   Component
 } from 'react'
 import {
-  BrowserRouter as Router,
+  HashRouter as Router,
   Route
 } from 'react-router-dom'
 import ScrollToTop from './ScrollToTop'