{ "name": "Laoshi 老师", "short_name": "Laoshi", "start_url": "/", "display": "standalone",
  "background_color": "#0F0F12", "theme_color": "#0F0F12", "lang": "vi",
  "icons": [ { "src": "/icon-192.png", "sizes": "192x192", "type": "image/png" }, { "src": "/icon-512.png", "sizes": "512x512", "type": "image/png" } ] }