introduced yarn workspace

packages/web/src/App.js

@@ -0,0 +1,21 @@
+import React from 'react';
+import './index.css';
+import Screen from './Screen';
+import { CurrentWidgetProvider, CurrentDatabaseProvider, OpenedTabsProvider } from './utility/globalState';
+import { SocketProvider } from './utility/SocketProvider';
+
+function App() {
+  return (
+    <CurrentWidgetProvider>
+      <CurrentDatabaseProvider>
+        <SocketProvider>
+          <OpenedTabsProvider>
+            <Screen />
+          </OpenedTabsProvider>
+        </SocketProvider>
+      </CurrentDatabaseProvider>
+    </CurrentWidgetProvider>
+  );
+}
+
+export default App;