manifest.json

{
  "name": "Aleth",
  "short_name": "Aleth",
  "description": "Simple flashcards",
  "start_url": ".",
  "display": "standalone",
  "theme_color": "#5087cf",
  "background_color": "#8dbefe",
  "icons": [
    {
      "src": "img/icon-6.png",
      "sizes": "6x6"
    },
    {
      "src": "img/icon-12.png",
      "sizes": "12x12"
    },
    {
      "src": "img/icon-18.png",
      "sizes": "18x18"
    },
    {
      "src": "img/icon-24.png",
      "sizes": "24x24"
    },
    {
      "src": "img/icon-48.png",
      "sizes": "48x48"
    },
    {
      "src": "img/icon-60.png",
      "sizes": "60x60"
    },
    {
      "src": "img/icon-120.png",
      "sizes": "120x120"
    },
    {
      "src": "img/icon-180.png",
      "sizes": "180x180"
    },
    {
      "src": "img/icon-240.png",
      "sizes": "240x240"
    },
    {
      "src": "img/icon-480.png",
      "sizes": "480x480"
    },
    {
      "src": "img/icon-516.png",
      "sizes": "516x516"
    }
  ]
}