@craftkit/craft-sample-stickyheader/docroot/manifest.json

Sample implementation for Craft-Widget-StickyHeaderNavi

{
	"name": "pwa test",
	"short_name": "test",
	"background_color": "#f0f0f0",
	"icons": [{
		"src": "img/icon-256.jpg",
		"sizes": "256x256",
		"type": "image/jpeg"
	},{
		"src": "img/icon-192.jpg",
		"sizes": "192x192",
		"type": "image/jpeg"
	}],
	"start_url": "index.html",
	"display": "standalone"
}