added pwa ap manifest

vue/index.html

@@ -5,6 +5,9 @@
   <meta charset="UTF-8">
   <link rel="icon" type="image/svg+xml" href="/favicon.svg">
   <link rel="alternate icon" href="/favicon.ico">
+  <link rel="manifest" href="/manifest.json">
+  <link rel="apple-touch-icon" href="/icon-192.png">
+  <meta name="theme-color" content="#1a8f5e">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <title>RSS-Reader</title>
   <link rel="preconnect" href="https://fonts.googleapis.com">

vue/public/manifest.json

@@ -0,0 +1,20 @@
+{
+  "name": "RSS Reader",
+  "short_name": "RSS Reader",
+  "start_url": "/",
+  "display": "standalone",
+  "background_color": "#ffffff",
+  "theme_color": "#1a8f5e",
+  "icons": [
+    {
+      "src": "/icon-192.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    },
+    {
+      "src": "/icon-512.png",
+      "sizes": "512x512",
+      "type": "image/png"
+    }
+  ]
+}