firebase.json

{
  "database": {
  },
  "storage": {
  },
  "hosting": {
    "public": "public",
    "ignore": [
      "firebase.json",
      "database-rules.json",
      "storage.rules"
    ],
    "headers": [
      {
        "source" : "**/*.@(eot|otf|ttf|ttc|woff|font.css)",
        "headers" : [ {
          "key" : "Access-Control-Allow-Origin",
          "value" : "*"
        } ]
      },
      {
        "source" : "**/*.@(jpg|jpeg|gif|png)",
        "headers" : [ {
          "key" : "Cache-Control",
          "value" : "max-age=7200"
        } ]
      },
      {
        "source" : "/",
        "headers" : [ {
          "key" : "Cache-Control",
          "value" : "no-cache"
        } ]
      },
      {
        "source" : "index.html",
        "headers" : [ {
          "key" : "Cache-Control",
          "value" : "no-cache"
        } ]
      },
      {
        "source" : "**/*.css",
        "headers" : [ {
          "key" : "Cache-Control",
          "value" : "no-cache"
        } ]
      },
      {
        "source" : "**/*.js",
        "headers" : [ {
          "key" : "Cache-Control",
          "value" : "no-cache"
        } ]
      }
    ]
  }
}