message: Fixed 408 error, autogen url new app
diff: "type": "string",
  "minLength": 3
  },
  +
  "url": {
  + "oneOf": [
  + {
  "type": "string",
  "format": "uri",
  "description": "URL to the application."
  + },
  + {
  + "type": "string",
  + "maxLength": 0
  + }
  + ]
  }
  }
  }
  