firebase.json

{
    "hosting": {
        "public": "public",
        "ignore": ["firebase.json", "**/.*", "**/node_modules/**"],
        "headers": [
            {
                "source": "**/*.@(js|css|html)",
                "headers": [
                    {
                        "key": "Cache-Control",
                        "value": "max-age=3600"
                    }
                ]
            },
            {
                "source": "**/lib/**",
                "headers": [
                    {
                        "key": "Cache-Control",
                        "value": "max-age=604800"
                    }
                ]
            },
            {
                "source": "**/*.@(jpg|jpeg|gif|png)",
                "headers": [
                    {
                        "key": "Cache-Control",
                        "value": "max-age=604800"
                    }
                ]
            }
        ]
    }
}