Added initial docs page skeleton

docusaurus/website/core/Footer.js

@@ -0,0 +1,20 @@
+/**
+ * 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 React = require('react');
+
+class Footer extends React.Component {
+  render() {
+    return (
+      <footer className="nav-footer" id="footer">
+        <section className="copyright">{this.props.config.copyright}</section>
+      </footer>
+    );
+  }
+}
+
+module.exports = Footer;