Feat update ui

Re-write UI with React Hooks.

Added socket.io test server.

Server usage:

1. Install socket.io

npm install socket.io

2. Run it

node test-server.js

react/src/components/Main.jsx

@@ -13,6 +13,8 @@ import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
 const DEBUG = true;
 // use REMOTE_USER for production
 const username = 'louistw';
+const params = new URLSearchParams(window.location.search);
+const redir_url = params.get('redir') || '/pun/sys/dashboard';
 
 function Main(props) {
   // Setup states
@@ -78,8 +80,8 @@ function Main(props) {
           clearTimeout(myTimer);
       })()
       setTimeout(() => {
-        if (DEBUG) console.log('Redirecting to /test')
-        window.location = '/test';
+        if (DEBUG) console.log('Redirecting to ' + redir_url)
+        window.location = redir_url;
       }, sec * 1000);
     });