Add API for frameworks and examples (#3514)

* Add API for frameworks and examples

* Adjust headers

* Update frameworks list

* Always use latest

* Add types

* Use now repo for downloading and listing

* Use .existsSync

* Remove unused packages

* Use 307 for redirect

* Add examples

* Update tsconfig.json

Co-Authored-By: Steven <steven@ceriously.com>

* Make examples unique

* Remove detectors from frameworks API

* Use /api instead of Next.js

* Install dependencies

* Rename project

* Change name

* Empty

* Change name

* Update api/tsconfig.json

Co-Authored-By: Steven <steven@ceriously.com>

* Update examples

Co-authored-by: Steven <steven@ceriously.com>

examples/create-react-app-functions/.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# production
+/build
+/dist
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Environment Variables
+.env
+.env.build

examples/create-react-app-functions/.nowignore

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+README.md
+yarn.lock

examples/create-react-app-functions/README.md

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+![React Logo](../.github/images/react.svg)
+
+# React Example
+
+This directory is a brief example of a [React](https://reactjs.org/) app with [Serverless Functions](https://zeit.co/docs/v2/serverless-functions/introduction) that can be deployed with ZEIT Now and zero configuration.
+
+## Deploy Your Own
+
+Deploy your own React project, along with Serverless Functions, with ZEIT Now.
+
+[![Deploy with ZEIT Now](https://zeit.co/button)](https://zeit.co/new/project?template=https://github.com/zeit/now-examples/tree/master/create-react-app-functions)
+
+_Live Example: https://create-react-app-functions.now-examples.now.sh/_
+
+### How We Created This Example
+
+To get started with React, along with [Serverless Functions](https://zeit.co/docs/v2/serverless-functions/introduction), with ZEIT Now, you can use the [Create-React-App CLI](https://reactjs.org/docs/create-a-new-react-app.html#create-react-app) to initialize the project:
+
+```shell
+$ npx create-react-app my-app
+```
+
+### Deploying From Your Terminal
+
+You can deploy your new React project, along with [Serverless Functions](https://zeit.co/docs/v2/serverless-functions/introduction), with a single command from your terminal using [Now CLI](https://zeit.co/download):
+
+```shell
+$ now
+```

examples/create-react-app-functions/api/date.go

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+package handler
+
+import (
+	"fmt"
+	"net/http"
+	"time"
+)
+
+func Handler(w http.ResponseWriter, r *http.Request) {
+	currentTime := time.Now().Format(time.RFC850)
+	fmt.Fprintf(w, currentTime)
+}

examples/create-react-app-functions/api/go.mod

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+module example-date
+
+go 1.12

examples/create-react-app-functions/package.json

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+{
+  "name": "create-react-app",
+  "version": "0.1.0",
+  "private": true,
+  "dependencies": {
+    "react": "^16.6.1",
+    "react-dom": "^16.6.1",
+    "react-scripts": "2.1.1"
+  },
+  "scripts": {
+    "dev": "BROWSER=none react-scripts start",
+    "build": "react-scripts build",
+    "test": "react-scripts test",
+    "eject": "react-scripts eject"
+  },
+  "browserslist": [
+    ">0.2%",
+    "not dead",
+    "not ie <= 11",
+    "not op_mini all"
+  ]
+}

examples/create-react-app-functions/src/App.css

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+main {
+  align-content: center;
+  box-sizing: border-box;
+  display: grid;
+  font-family: 'SF Pro Text', 'SF Pro Icons', 'Helvetica Neue', 'Helvetica',
+    'Arial', sans-serif;
+  hyphens: auto;
+  line-height: 1.65;
+  margin: 0 auto;
+  max-width: 680px;
+  min-height: 100vh;
+  padding: 72px 0;
+  text-align: center;
+}
+h1 {
+  font-size: 45px;
+}
+h2 {
+  margin-top: 1.5em;
+}
+p {
+  font-size: 16px;
+}
+a {
+  border-bottom: 1px solid white;
+  color: #0076ff;
+  cursor: pointer;
+  text-decoration: none;
+  transition: all 0.2s ease;
+}
+a:hover {
+  border-bottom: 1px solid #0076ff;
+}
+code,
+pre {
+  color: #d400ff;
+  font-family: Menlo, Monaco, Lucida Console, Liberation Mono, DejaVu Sans Mono,
+    Bitstream Vera Sans Mono, Courier New, monospace, serif;
+  font-size: 0.92em;
+}
+code:before,
+code:after {
+  content: '\`';
+}

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

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+import React from 'react';
+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 (
+    <main>
+      <h1>Create React App + Go API</h1>
+      <h2>
+        Deployed with{' '}
+        <a
+          href="https://zeit.co/docs"
+          target="_blank"
+          rel="noreferrer noopener"
+        >
+          ZEIT Now
+        </a>
+        !
+      </h2>
+      <p>
+        <a
+          href="https://github.com/zeit/now-examples/tree/master/create-react-app-functions"
+          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>
+  );
+}
+
+export default App;

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

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+import React from 'react';
+import ReactDOM from 'react-dom';
+import App from './App';
+
+it('renders without crashing', () => {
+  const div = document.createElement('div');
+  ReactDOM.render(<App />, div);
+  ReactDOM.unmountComponentAtNode(div);
+});

examples/create-react-app-functions/src/index.css

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+body {
+  margin: 0;
+  padding: 0;
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen",
+    "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue",
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+code {
+  font-family: source-code-pro, Menlo, Monaco, Consolas, "Courier New",
+    monospace;
+}

examples/create-react-app-functions/src/index.js

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+import React from 'react';
+import ReactDOM from 'react-dom';
+import './index.css';
+import App from './App';
+import * as serviceWorker from './serviceWorker';
+
+ReactDOM.render(<App />, document.getElementById('root'));
+
+// If you want your app to work offline and load faster, you can change
+// unregister() to register() below. Note this comes with some pitfalls.
+// Learn more about service workers: http://bit.ly/CRA-PWA
+serviceWorker.unregister();

examples/create-react-app-functions/src/serviceWorker.js

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+// This optional code is used to register a service worker.
+// register() is not called by default.
+
+// This lets the app load faster on subsequent visits in production, and gives
+// it offline capabilities. However, it also means that developers (and users)
+// will only see deployed updates on subsequent visits to a page, after all the
+// existing tabs open on the page have been closed, since previously cached
+// resources are updated in the background.
+
+// To learn more about the benefits of this model and instructions on how to
+// opt-in, read http://bit.ly/CRA-PWA
+
+const isLocalhost = Boolean(
+  window.location.hostname === 'localhost' ||
+    // [::1] is the IPv6 localhost address.
+    window.location.hostname === '[::1]' ||
+    // 127.0.0.1/8 is considered localhost for IPv4.
+    window.location.hostname.match(
+      /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
+    )
+);
+
+export function register(config) {
+  if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
+    // The URL constructor is available in all browsers that support SW.
+    const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href);
+    if (publicUrl.origin !== window.location.origin) {
+      // Our service worker won't work if PUBLIC_URL is on a different origin
+      // from what our page is served on. This might happen if a CDN is used to
+      // serve assets; see https://github.com/facebook/create-react-app/issues/2374
+      return;
+    }
+
+    window.addEventListener('load', () => {
+      const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
+
+      if (isLocalhost) {
+        // This is running on localhost. Let's check if a service worker still exists or not.
+        checkValidServiceWorker(swUrl, config);
+
+        // Add some additional logging to localhost, pointing developers to the
+        // service worker/PWA documentation.
+        navigator.serviceWorker.ready.then(() => {
+          console.log(
+            'This web app is being served cache-first by a service ' +
+              'worker. To learn more, visit http://bit.ly/CRA-PWA'
+          );
+        });
+      } else {
+        // Is not localhost. Just register service worker
+        registerValidSW(swUrl, config);
+      }
+    });
+  }
+}
+
+function registerValidSW(swUrl, config) {
+  navigator.serviceWorker
+    .register(swUrl)
+    .then(registration => {
+      registration.onupdatefound = () => {
+        const installingWorker = registration.installing;
+        if (installingWorker == null) {
+          return;
+        }
+        installingWorker.onstatechange = () => {
+          if (installingWorker.state === 'installed') {
+            if (navigator.serviceWorker.controller) {
+              // At this point, the updated precached content has been fetched,
+              // but the previous service worker will still serve the older
+              // content until all client tabs are closed.
+              console.log(
+                'New content is available and will be used when all ' +
+                  'tabs for this page are closed. See http://bit.ly/CRA-PWA.'
+              );
+
+              // Execute callback
+              if (config && config.onUpdate) {
+                config.onUpdate(registration);
+              }
+            } else {
+              // At this point, everything has been precached.
+              // It's the perfect time to display a
+              // "Content is cached for offline use." message.
+              console.log('Content is cached for offline use.');
+
+              // Execute callback
+              if (config && config.onSuccess) {
+                config.onSuccess(registration);
+              }
+            }
+          }
+        };
+      };
+    })
+    .catch(error => {
+      console.error('Error during service worker registration:', error);
+    });
+}
+
+function checkValidServiceWorker(swUrl, config) {
+  // Check if the service worker can be found. If it can't reload the page.
+  fetch(swUrl)
+    .then(response => {
+      // Ensure service worker exists, and that we really are getting a JS file.
+      const contentType = response.headers.get('content-type');
+      if (
+        response.status === 404 ||
+        (contentType != null && contentType.indexOf('javascript') === -1)
+      ) {
+        // No service worker found. Probably a different app. Reload the page.
+        navigator.serviceWorker.ready.then(registration => {
+          registration.unregister().then(() => {
+            window.location.reload();
+          });
+        });
+      } else {
+        // Service worker found. Proceed as normal.
+        registerValidSW(swUrl, config);
+      }
+    })
+    .catch(() => {
+      console.log(
+        'No internet connection found. App is running in offline mode.'
+      );
+    });
+}
+
+export function unregister() {
+  if ('serviceWorker' in navigator) {
+    navigator.serviceWorker.ready.then(registration => {
+      registration.unregister();
+    });
+  }
+}