message: docs(aio): add mix and connect to front page campaigns
  PR Close
diff: "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/"
  + },
  + {
  + "startDate": "2018-06-01",
  + "endDate": "2018-08-15",
  + "message": "Join us for Angular Mix<br/>October 10th-12th, 2018",
  + "imageUrl": "generated/images/marketing/home/angular-mix.png",
  + "linkUrl": "https://angularmix.com/"
  + },
  + {
  + "startDate": "2018-08-15",
  + "endDate": "2018-11-06",
  + "message": "Join us for Angular Connect<br/>November 6th-7th, 2018",
  + "imageUrl": "generated/images/marketing/home/angular-connect.png",
  + "linkUrl": "https://angularconnect.com/"
  }
  ]
  