add frontend files

app/javascript/src/App.tsx

@@ -0,0 +1,30 @@
+import React from "react"
+import {
+  BrowserRouter as Router,
+  Switch,
+  Route,
+} from "react-router-dom";
+import { AppContext } from "./contexts/AppContext";
+import { AuthProvider } from "./contexts/AuthProvider";
+import { Home } from "./pages";
+
+export const App = () => {
+  return (
+    <AuthProvider>
+      <AppContext>
+        <main className="min-h-screen w-full bg-gray-50 flex flex-col">
+          <Router>
+            <Switch>
+              <Route path="/hello_about">
+                <div className="bg-gray-600">Hello World!</div>
+              </Route>
+              <Route path="/">
+                <Home />
+              </Route>
+            </Switch>
+          </Router>
+        </main>
+      </AppContext>
+    </AuthProvider>
+  )
+}