{
    "name": "サブタイトル＋タイトル＋テキスト"
    , "short_name": "アプリ表示名（短縮用）"
    , "start_url": "."
    , "display": "standalone"
    , "icons": [
        { "src": "/pwa/192.png", "sizes": "192x192", "type": "image/png" }
        , { "src": "/pwa/512.png", "sizes": "512x512", "type": "image/png" }
    ]
    , "screenshots": [
        { "src": "/pwa/540x960.png", "sizes": "540x960", "type": "image/png", "form_factor": "handset" }
        , { "src": "/pwa/1280x720.png", "sizes": "1280x720", "type": "image/png", "form_factor": "wide" }
    ]
}