manifest.json

{
  "short_name": "r.guelle.de",
  "name": "roland.guelle.de",
  "start_url": "/index.html?launcher=true",
  "background_color": "#4A5A69",
  "theme_color": "#4A5A69",
  "display": "minimal-ui",
  "icons": [
      {
        "src": "./images/logo-48x48.png",
        "type": "image/png",
        "sizes": "48x48"
      },
      {
        "src": "./images/logo-96x96.png",
        "type": "image/png",
        "sizes": "96x96"
      },
      {
        "src": "./images/logo-192x192.png",
        "type": "image/png",
        "sizes": "192x192"
      },  
      {  
        "src": "/images/logo-256x256.png",  
        "sizes": "256x256",  
        "type": "image/png"  
      },  
      {  
        "src": "/images/logo-384x384.png",  
        "sizes": "384x384",  
        "type": "image/png"  
      },  
      {  
        "src": "/images/logo-512x512.png",  
        "sizes": "512x512",  
        "type": "image/png"  
      }
    ]
}