manifest.json

{
  "lang": "en",
  "name": "Prelude",
  "short_name": "Prelude",
  "start_url": "./#/?homescreen=1",
  "display": "standalone",
  "theme_color": "#00bcd4",
  "background_color": "#eee",
  "icons": [
    {
      "src": "img/icon-512.png",
      "sizes": "512x512",
      "type": "image/png"
    },
    {
      "src": "img/icon-256.png",
      "sizes": "256x256",
      "type": "image/png"
    },
    {
      "src": "img/icon-144.png",
      "sizes": "144x144",
      "type": "image/png"
    },
    {
      "src": "img/icon-128.png",
      "sizes": "128x128",
      "type": "image/png"
    },
    {
      "src": "img/icon-64.png",
      "sizes": "64x64",
      "type": "image/png"
    },
    {
      "src": "img/icon-32.png",
      "sizes": "32x32",
      "type": "image/png"
    },
    {
      "src": "img/icon-16.png",
      "sizes": "16x16",
      "type": "image/png"
    }
  ]
}