manifest.json minimum

manifest.json

{
  "id": "web-app-id",
  "name": "My Web App Name",
  "short_name": "Web App",
  "icons": [
    {
      "src": "/web-app-manifest-192x192.png",
      "sizes": "192x192",
      "type": "image/png",
      "purpose": "maskable"
    },
    {
      "src": "/web-app-manifest-512x512.png",
      "sizes": "512x512",
      "type": "image/png",
      "purpose": "maskable"
    },
    {
      "src": "/web-app-manifest-192x192.png",
      "sizes": "192x192",
      "type": "image/png",
      "purpose": "any"
    },
    {
      "src": "/web-app-manifest-512x512.png",
      "sizes": "512x512",
      "type": "image/png",
      "purpose": "any"
    }
  ],
  "theme_color": "#ffffff",
  "background_color": "#ffffff",
  "display": "standalone",
  "start_url": "/",
  "scope": "/",
  "orientation": "portrait",
  "dir": "ltr",
  "categories": [
    "utilities"
  ],
  "display_override": [
    "window-controls-overlay",
    "standalone"
  ]
}