Add license to files (#2722)

Summary:
Pull Request resolved: #2722

These files were created as part of the website upgrade but are missing licensing headers.

Reviewed By: saitcakmak

Differential Revision: D69054499

fbshipit-source-id: 617275ac8fd7e5804a68db48b658791ad7748d68

Author: CristianLara

sphinx/source/_static/custom.css

@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 .wy-nav-content {
   max-width: initial;
 }

website/docusaurus.config.js

@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 import {themes as prismThemes} from 'prism-react-renderer';
 import remarkMath from 'remark-math';
 import rehypeKatex from 'rehype-katex';

website/sidebars.js

@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 const tutorials = () => {
   const allTutorialMetadata = require('./tutorials.json');
   const tutorialsSidebar = [{

website/src/css/customTheme.css

@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 :root{
   --ifm-color-primary-lightest: #F7C38B;
   --ifm-color-primary-lighter: #F5AE61;