message: docs(aio): add front page campaign for the ng-conf live stream
  PR Close
diff: [
  {
  "startDate": "2018-02-14",
  - "endDate": "2018-04-22",
  + "endDate": "2018-04-18",
  "message": "Join us for ng-conf<br/>Apr 18th-20th, 2018",
  "imageUrl": "generated/images/marketing/home/ng-conf.png",
  "linkUrl": "http://ng-conf.org/"
  + },
  + {
  + "startDate": "2018-04-18",
  + "endDate": "2018-04-22",
  + "message": "Watch ng-conf live stream <br/>Apr 18th-20th, 2018",
  + "imageUrl": "generated/images/marketing/home/ng-conf.png",
  + "linkUrl": "https://www.ng-conf.org/livestream/"
  }
  ]
  