add app installtion page

src/components/AppInstallation.js

@@ -0,0 +1,23 @@
+import React, { useEffect, useState, useRef } from 'react';
+import { query, collection, onSnapshot } from 'firebase/firestore';
+
+import './AppInstallation.css';
+import db from '../firebase';
+
+const AppInstallation = () => {
+    const [alerts, setAlerts] = useState([]);
+
+    useEffect(() => {
+    }, []);
+
+    return (
+        <div>
+            <div>
+                <div>Testing 2.1.10 (Preprod)</div>
+                <img className="app-qrcode" src={require('../assets/testing_2_1_10.png')} alt='icon'></img>
+            </div>
+        </div>
+    )
+}
+
+export default AppInstallation;