Angular 4 website - how we use apple-app-site-association

Question

I have created file like apple-app-site-association and move the file to www folder and try access this file from url for universal linking, it always show not found and online validator shows the error.

{
“applinks”: {
    “apps”: [],
    “details”: [
        {
            “appID”: “T5TQ36Q2SQ.com.reddit.production”,
            “paths”: [“*”],
        }
    ]
}

}

So please any body help me out, how we configure apple-app-site-association file in angular web project. Is there any way return header content type for angular web project instead of view, because apple need content type as application/json