add demo script using websockets and asyncio

docs/client.html

@@ -3,13 +3,14 @@
 <div id="data"></div>
 <script src="https://code.jquery.com/jquery-3.6.3.min.js"></script>
 <script>
-    let socket = new WebSocket("ws://localhost:5000/testProject");
+    let socket = new WebSocket("ws://localhost:5000");
     let projectID = "1234"; // hier project ID eintragen
 
     function setVariable(name, value) {
         console.log(`Setting variable: ${name} = ${value}`);
         socket.send(JSON.stringify({
             method: "set",
+            project_id: projectID,
             name,
             value
         }));
@@ -21,8 +22,10 @@
       socket.send(JSON.stringify({
         method: "handshake",
         project_id: projectID,
-        user: "testClientHtml"
+        user: "testClient"+Math.random()
       }));
+
+      setInterval(function() { setVariable('test',Math.random()) }, Math.random(3)*1000);
     };
 
     socket.onmessage = function(event) {