manifest.json

{
  "name": "SIcalc",
  "short_name": "SIcalc",
  "icons": [
    {
      "src": "./images/icons/icon-128x128.png",
      "sizes": "128x128",
      "type": "image/png"
    }, 
    {
      "src": "./images/icons/icon-144x144.png",
      "sizes": "144x144",
      "type": "image/png"
    }, 
    {
      "src": "./images/icons/icon-152x152.png",
      "sizes": "152x152",
      "type": "image/png"
    }, 
    {
      "src": "./images/icons/icon-192x192.png",
      "sizes": "192x192",
      "type": "image/png"
    }, 
    {
      "src": "./images/icons/icon-256x256.png",
      "sizes": "256x256",
      "type": "image/png"
    }, 
    {
      "src": "./images/icons/icon-512x512.png",
      "sizes": "512x512",
      "type": "image/png"
    },
    {
      "src": "./images/icons/maskable_icon.png",
      "sizes": "640x640",
      "type": "image/png",
      "purpose": "any maskable"
    }
  ],
  "start_url": "./index.html",
  "display": "standalone",
  "background_color": "#3E4EB8",
  "theme_color": "#2F3BA2"
}