I can not add proxy at ionic view pro

How to add proxy at ionic view pro? because when me add line like this is not compiled at ionic Build Log.

{
  "name": "xxxxxx",
  "app_id": "xxxxxxxxx",
  "type": "ionic-angular",
  "integrations": {},
  "proxies": [{
    "path": "/api",
    "proxyUrl": "http://xxxx.xxxx.com/"
  }]
}

That proxies is not compiled as Proxy added at ionic view pro build log.

Finally… i solve this problem with change from http to https… no need proxy…