add: boilerplate w/ navbar, tailwindcss

frontend/src/App.jsx

@@ -1,33 +1,15 @@
-import { useState } from 'react'
-import reactLogo from './assets/react.svg'
-import viteLogo from '/vite.svg'
+import { Outlet } from 'react-router-dom'
 import './App.css'
+import NavBar from './components/navbar'
 
 function App() {
-  const [count, setCount] = useState(0)
 
   return (
     <>
-      <div>
-        <a href="https://vitejs.dev" target="_blank">
-          <img src={viteLogo} className="logo" alt="Vite logo" />
-        </a>
-        <a href="https://react.dev" target="_blank">
-          <img src={reactLogo} className="logo react" alt="React logo" />
-        </a>
+      <div className='flex flex-col items-center bg-gray-600 min-h-screen'>
+        <NavBar />
+        <Outlet />
       </div>
-      <h1>Vite + React</h1>
-      <div className="card">
-        <button onClick={() => setCount((count) => count + 1)}>
-          count is {count}
-        </button>
-        <p>
-          Edit <code>src/App.jsx</code> and save to test HMR
-        </p>
-      </div>
-      <p className="read-the-docs">
-        Click on the Vite and React logos to learn more
-      </p>
     </>
   )
 }