chore(v2): add Facebook copyright headers (#1067)

v2/lib/core/App.js

@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) 2017-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 import {renderRoutes} from 'react-router-config';
 
 import routes from '@generated/routes'; // eslint-disable-line

v2/lib/core/clientEntry.js

@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) 2017-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 import React from 'react';
 import Loadable from 'react-loadable';
 import {BrowserRouter} from 'react-router-dom';

v2/lib/core/devTemplate.ejs

@@ -9,4 +9,4 @@
     <div id="app"></div>
     <script src="<%= htmlWebpackPlugin.files.chunks.main.entry %>"></script>
   </body>
-</html>
+</html>

v2/lib/core/preload.js

@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) 2017-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 import {matchRoutes} from 'react-router-config';
 
 /**

v2/lib/core/serverEntry.js

@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) 2017-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 import React from 'react';
 import {StaticRouter} from 'react-router-dom';
 import ReactDOMServer from 'react-dom/server';

v2/lib/core/sitemap.js

@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) 2017-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 const sitemap = require('sitemap');
 
 module.exports = async function createSitemap({