added PWA support

assets/manifest.json

@@ -0,0 +1,29 @@
+{
+  "dir": "ltr",
+  "name": "Robert Jeutter Businesscard",
+  "short_name": "R. Jeutter",
+  "description": "You wonna know more about me? Then look here.",
+  "lang": "en",
+  "scope": "/",
+  "start_url": "wieerwill.github.io",
+  "theme_color": "#9bccd0",
+  "background_color": "#f0c5cf",
+  "display": "fullscreen",
+  "orientation": "any",
+  "related_applications": [],
+  "prefer_related_applications": false,
+  "icons": [
+    {
+      "src": "favicon/manifest-icon-192.jpg",
+      "sizes": "192x192",
+      "type": "image/jpg",
+      "purpose": "maskable any"
+    },
+    {
+      "src": "favicon/manifest-icon-512.jpg",
+      "sizes": "512x512",
+      "type": "image/jpg",
+      "purpose": "maskable any"
+    }
+  ]
+}