{
  "id": "/", "name": "mamimumemo Rails", "short_name": "mamimumemo",
  "icons": [{"src":"/icon.png","type":"image/png","sizes":"512x512","purpose":"any maskable"}],
  "start_url": "/", "display": "standalone", "scope": "/",
  "description": "個人と共有のメモを安全にまとめる", "lang": "ja",
  "theme_color": "#3d654b", "background_color": "#ffffff"
}