feat: login wall (#42)

* feat: add login-wall app

* fix: rename vars

* fix: rename vars

* update docker file

* add validations for app state

* add host check for app

* fix: docker file

app/src/index.tsx

@@ -0,0 +1,5 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import App from './App';
+
+ReactDOM.render(<App />, document.getElementById('root'));