setup webserver for flipper-server

Summary:
This sets up the metro bundler for flipper-server, to be able to serve the front end.

Note that this is a setup that is only relevant for development purposes

Done in this diff:

* setup metro
* setup fast refresh
* setup nodemon to be able to refresh on server changes

Not done in this diff

* Setup FlipperServerImpl in the flipper-server
* Load flipper-ui-core in flipper-ui-browser
* Load plugins
* Support options, env vars etc etc
* Make flipper-server stand alone (it is largely self contained, but still requires some static resources like theming)

Reviewed By: passy, aigoncharov

Differential Revision: D32626137

fbshipit-source-id: 47f580356ddf0993392d3b583082b187661727e9

desktop/flipper-ui-browser/src/index-fast-refresh.tsx

@@ -0,0 +1,53 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+import {default as HmrClient} from './HMRClient';
+// @ts-ignore
+import {default as ReactRefreshRuntime} from 'react-refresh/runtime';
+
+HmrClient.setup(
+  'web',
+  (window as any).flipperConfig.entryPoint,
+  'localhost',
+  window.location.port,
+  true,
+);
+
+ReactRefreshRuntime.injectIntoGlobalHook(window);
+
+const Refresh = {
+  performFullRefresh(reason: string) {
+    console.log('Perform full refresh', reason);
+    window.location.reload();
+  },
+
+  createSignatureFunctionForTransform:
+    ReactRefreshRuntime.createSignatureFunctionForTransform,
+
+  isLikelyComponentType: ReactRefreshRuntime.isLikelyComponentType,
+
+  getFamilyByType: ReactRefreshRuntime.getFamilyByType,
+
+  register: ReactRefreshRuntime.register,
+
+  performReactRefresh() {
+    if (ReactRefreshRuntime.hasUnrecoverableErrors()) {
+      console.error('Fast refresh - Unrecolverable');
+      window.location.reload();
+      return;
+    }
+    ReactRefreshRuntime.performReactRefresh();
+    console.log('Perform react refresh');
+  },
+};
+
+(require as any).Refresh = Refresh;
+
+// eslint-disable-next-line import/no-commonjs
+require('./index.tsx');