manifest.json

{
	"name": "PWA",
	"short_name": "Simple PWA",
	"lang": "en-GB",
	"start_url": "index.html",
	"display": "standalone",
	"background_color": "#005EB8",
	"theme_color": "#005EB8",
	"icons": [
		{
			"src": "icons/maskable_icon.png",
			"type": "image/png",
			"purpose": "any maskable",
			"sizes": "72x72 96x96 120x120 128x128 144x144 152x152 180x180 192x192 256x256 384x384 512x512 1024x1024"
		}
	]
}