{ "name": "Koel", "start_url": "https://your.koel.host", "display": "standalone", "orientation": "portrait", "icons": [{ "src": "/img/icon.png", "sizes": "192x192", "type": "image/png" }], "background_color": "#181818", "description": "Personal audio streaming service that works.", "theme_color": "#181818" }