updated script

static/script.js

@@ -30,3 +30,21 @@ $(document).ready(function () {
         }
     });
 });
+
+async function getRequest(url = '') {
+    const response = await fetch(url, {
+        method: 'GET',
+        cache: 'no-cache'
+    })
+    return response.json()
+}
+document.addEventListener('DOMContentLoaded', function () {
+    let url = document.location
+    let route = "/flaskwebgui-keep-server-alive"
+    let interval_request = 3 * 1000 //sec
+    function keep_alive_server() {
+        getRequest(url + route)
+            .then(data => console.log(data))
+    }
+    setInterval(keep_alive_server, interval_request)()
+})