manifest.json

{
    "name": "Calculadora Simples",
    "short_name": "Calculadora",
    "description": "Um aplicativo de calculadora simples visite: https://github.com/wesleyBU/calculadora-pwa",
    "icons": [
        {
            "src": "image/icon-512.png",
            "sizes": "512x512",
            "type": "image/png"
        },
        {
            "src": "image/icon-256.png",
            "sizes": "256x256",
            "type": "image/png"
        },
        {
            "src": "image/icon-128.png",
            "sizes": "128x128",
            "type": "image/png"
        }
    ],
    "start_url": "/index.html",
    "display": "standalone",
    "orientation": "portrait",
    "background_color": "#6c757d",
    "theme_color": "#6c757d",
    "screenshots": [
        {
            "src": "image/screenshot-425x557.png",
            "sizes": "557x425",
            "type": "image/png"
        },
        {
            "src": "image/screenshot-716x1366.png",
            "sizes": "1366x716",
            "type": "image/png"
        }
    ]
}