adding manifest

src/index.html

@@ -15,6 +15,7 @@
 	<link rel="shortcut icon" href="/favicon.ico">
 
   <link rel="canonical" href="https://uitmpwatraining.web.app/">
+	<link rel="manifest" href="/manifest.json">
 
 	<!-- Android  -->
 	<meta name="theme-color" content="#3F51B5">

src/manifest.json

+{
+  "name": "PWA Training",
+  "short_name": "PWATraining",
+  "description": "Initial release of web app. Work-in-progress (WIP).",
+  "theme_color": "#2f3ba2",
+  "background_color": "#3e4eb8",
+  "display": "standalone",
+  "orientation": "portrait",
+  "scope": "/",
+  "start_url": "/?utm_source=standalone&utm_medium=pwa",
+  "icons": [
+    {
+      "src": "images/icons/icon-72x72.png",
+      "sizes": "72x72",
+      "type": "image/png"
+    },
+    {
+      "src": "images/icons/icon-96x96.png",
+      "sizes": "96x96",
+      "type": "image/png"
+    },
+    {
+      "src": "images/icons/icon-128x128.png",
+      "sizes": "128x128",
+      "type": "image/png"
+    },
+    {
+      "src": "images/icons/icon-144x144.png",
+      "sizes": "144x144",
+      "type": "image/png"
+    },
+    {
+      "src": "images/icons/icon-152x152.png",
+      "sizes": "152x152",
+      "type": "image/png"
+    },
+    {
+      "src": "images/icons/icon-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    },
+    {
+      "src": "images/icons/icon-384x384.png",
+      "sizes": "384x384",
+      "type": "image/png"
+    },
+    {
+      "src": "images/icons/icon-512x512.png",
+      "sizes": "512x512",
+      "type": "image/png"
+    }
+  ]
+}