Refresh viewer counter every 20 seconds

web/static/js/viewersCounter.js

@@ -0,0 +1,18 @@
+function refreshViewersCounter() {
+    let xhr = new XMLHttpRequest()
+    xhr.open("GET", "/_stats/", true)
+    xhr.onload = function () {
+        console.log(xhr.response)
+        if (xhr.status === 200) {
+            let data = JSON.parse(xhr.response)
+            document.getElementById("connected-people").innerText = data.ConnectedViewers
+        }
+        else
+            console.log("WARNING: status code " + xhr.status + " was returned while fetching connected viewers.")
+    }
+    xhr.send()
+
+    setTimeout(refreshViewersCounter, 20000)
+}
+
+refreshViewersCounter()