{ "short_name": "Touch Panel", "name": "Touch Panel", "icons": [ { "src": "favicon.ico", "sizes": "64x64 32x32 24x24 16x16", "type": "image/x-icon" }, { "src": "logo192.png", "type": "image/png", "sizes": "192x192" }, { "src": "logo512.png", "type": "image/png", "sizes": "512x512" }, { "src": "logo192.png", "sizes": "192x192", "type": "image/png", "purpose": "maskable" } ], "start_url": ".", "display": "standalone", "theme_color": "#000000", "background_color": "#ffffff" }