added missing files

src/client/manifest.json

@@ -0,0 +1,12 @@
+{
+	"short_name": "IWD",
+	"name": "Isleward",
+	"icons": [{
+		"src": "/images/icon.png",
+		"sizes": "192x192",
+		"type": "image/png"
+	}],
+	"start_url": "/index.html",
+	"display": "fullscreen",
+	"orientation": "landscape"
+}