server/public/manifest.json

{
    "short_name": "SimpleServer",
    "name": "Simple Single Page Server Setup",
    "icons": [
      {
        "src": "android-chrome-192x192.png",
        "type": "image/png",
        "sizes": "192x192"
      },
      {
        "src": "android-chrome-512x512.png",
        "type": "image/png",
        "sizes": "512x512"
      },
      {
        "src": "apple-touch-icon.png",
        "type": "image/png",
        "sizes": "180x180",
        "purpose": "any maskable"
      }
    ],
    "start_url": "/?source=pwa",
    "background_color": "#607d8b",
    "display": "standalone",
    "scope": "/",
    "prefer_related_applications": false,
    "theme_color": "white"
  }