manifest.json

{
    "short_name": "Colosseum",
    "name": "Colosseum",
    "description": "Displays Pokemons in a beautiful way",
    "icons": [
        {
            "src": "images/icons/launcher-48.png",
            "sizes": "48x48",
            "type": "image/png"
        },
        {
            "src": "images/icons/launcher-96.png",
            "sizes": "96x96",
            "type": "image/png"
        },
        {
            "src": "images/icons/launcher-192.png",
            "sizes": "192x192",
            "type": "image/png"
        },
        {
            "src": "images/icons/launcher-256.png",
            "sizes": "256x256",
            "type": "image/png"
        },
        {
            "src": "images/icons/maskable-48.png",
            "sizes": "48x48",
            "type": "image/png",
            "purpose": "maskable"
        },
        {
            "src": "images/icons/maskable-96.png",
            "sizes": "96x96",
            "type": "image/png",
            "purpose": "maskable"
        },
        {
            "src": "images/icons/maskable-192.png",
            "sizes": "192x192",
            "type": "image/png",
            "purpose": "maskable"
        },
        {
            "src": "images/icons/maskable-256.png",
            "sizes": "256x256",
            "type": "image/png",
            "purpose": "maskable"
        }
    ],
    "start_url": "/Colosseum",
    "display": "standalone",
    "orientation": "portrait",
    "theme_color": "#29BDBB",
    "background_color": "#80b5ff",
    "prefer_related_applications": true
}