client/manifest.json
{
"name": "HelloBooks",
"short_name": "HelloBooks",
"description": "A library application.",
"start_url": "/",
"display": "standalone",
"background_color": "#011b33",
"theme_color": "#011b33",
"orientation": "portrait-primary",
"icons": [{
"src": "static/hello_icon_144.png",
"sizes": "144x144",
"type": "image/png"
}, {
"src": "static/hello_icon_192.png",
"sizes": "192x192",
"type": "image/png"
}, {
"src": "static/hello_icon_256.png",
"sizes": "256x256",
"type": "image/png"
}, {
"src": "static/hello_icon_512.png",
"sizes": "512x512",
"type": "image/png"
}]
}