firebase.json

{
  "hosting": {
    "public": "www",
    "ignore": [
      "firebase.json",
      "**/.*",
      "**/node_modules/**"
    ],
    "rewrites": [
      {
        "source": "**",
        "destination": "/index.html"
      }
    ],
    "headers": [
      {
        "source": "sw.js",
        "headers" : [ {
          "key" : "Cache-Control",
          "value" : "no-cache"
        } ]
      },
      {
        "source": "/",
        "headers": [
          {
            "key": "Link",
            "value": "</build/app/app.js>;rel=preload;as=script,</build/app/app.chdfnbna.js>;rel=preload;as=script,</build/app/ie9qb5fp.js>;rel=preload;as=script,</build/app/u46dsb2x.js>;rel=preload;as=script,</build/app/usrxxq8c.js>;rel=preload;as=script,</build/app/pzdrxf0h.js>;rel=preload;as=script,</build/app/yayakfgb.js>;rel=preload;as=script,</build/app/tiy7vpxe.js>;rel=preload;as=script,</build/app/weynqauc.js>;rel=preload;as=script,</build/app/ezaqz7rv.js>;rel=preload;as=script,</build/app/md-arrow-back.js>;rel=preload;as=script"
          }
        ]
      }
    ]
  }
}