Adds manifest.json to examples folder (#3536)

* Revert "Revert "[examples] Add manifest.json""

This reverts commit c65336e63b.

* Revert "Revert "Do not use now-examples anymore""

This reverts commit ac72e944a7.

* Update nowignore

* Fix join

* Fix JSON

* Fix header

* Replace manifest.json with @now/frameworks

* Adjust readmes

* Adjust .nowignore

* Update scully

* Fix description

* Update examples/create-react-app/src/App.js

Co-Authored-By: Shu Ding <ds303077135@gmail.com>

* Update readme

* Add websites

* Use https

* Adjust example URL

* Change order

Co-authored-by: Shu Ding <ds303077135@gmail.com>

examples/create-react-app/src/App.js

@@ -1,25 +1,56 @@
 import React from 'react';
-import logo from './logo.svg';
+import { useEffect, useState } from 'react';
 import './App.css';
 
 function App() {
+  const [date, setDate] = useState(null);
+  useEffect(() => {
+    async function getDate() {
+      const res = await fetch('/api/date');
+      const newDate = await res.text();
+      setDate(newDate);
+    }
+    getDate();
+  }, []);
   return (
-    <div className="App">
-      <header className="App-header">
-        <img src={logo} className="App-logo" alt="logo" />
-        <p>
-          Edit <code>src/App.js</code> and save to reload.
-        </p>
+    <main>
+      <h1>Create React App + Go API</h1>
+      <h2>
+        Deployed with{' '}
         <a
-          className="App-link"
-          href="https://reactjs.org"
+          href="https://zeit.co/docs"
           target="_blank"
-          rel="noopener noreferrer"
+          rel="noreferrer noopener"
         >
-          Learn React
+          ZEIT Now
         </a>
-      </header>
-    </div>
+        !
+      </h2>
+      <p>
+        <a
+          href="https://github.com/zeit/now-examples/tree/master/create-react-app"
+          target="_blank"
+          rel="noreferrer noopener"
+        >
+          This project
+        </a>{' '}
+        was bootstrapped with{' '}
+        <a href="https://facebook.github.io/create-react-app/">
+          Create React App
+        </a>{' '}
+        and contains three directories, <code>/public</code> for static assets,{' '}
+        <code>/src</code> for components and content, and <code>/api</code>{' '}
+        which contains a serverless <a href="https://golang.org/">Go</a>{' '}
+        function. See{' '}
+        <a href="/api/date">
+          <code>api/date</code> for the Date API with Go
+        </a>
+        .
+      </p>
+      <br />
+      <h2>The date according to Go is:</h2>
+      <p>{date ? date : 'Loading date...'}</p>
+    </main>
   );
 }