{ "name": "JJTech", "short_name": "JJTech", "icons": [ { "src": "/android-chrome-192x192.png", "sizes": "192x192", "type": "image/png" }, { "src": "/android-chrome-256x256.png", "sizes": "256x256", "type": "image/png" } ], "theme_color": "#000000", "background_color": "#000000", "display": "standalone" }