manifest.json

{
  "short_name": "LS Docs",
  "name": "LS Documentation",
  "theme_color": "#fff",
  "background_color": "#fff",
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      "sizes": "48x48"
    },
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      "type": "image/png",
      "sizes": "72x72"
    },
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      "type": "image/png",
      "sizes": "96x96"
    },
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      "src": "icon/android-icon-144x144.png",
      "type": "image/png",
      "sizes": "144x144"
    },
    {
      "src": "icon/android-icon-192x192.png",
      "type": "image/png",
      "sizes": "192x192"
    },
    {
      "src": "icon/apple-icon-120x120.png",
      "type": "image/png",
      "sizes": "120x120"
    },
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      "type": "image/png",
      "sizes": "310x310"
    }
  ],
  "start_url": "/",
  "orientation": "portrait"
}