now-deployment/node_modules/tracer/example/configFile3.json

{
    "format" : [
              "{{timestamp}} <{{title}}> {{message}} (in {{file}}:{{line}})", 
              {
                  "error" : "{{timestamp}} <{{title}}> {{message}} (in {{file}}:{{line}})\nCall Stack:\n{{stack}}"
              }	
    ],
    "dateformat" : "HH:MM:ss.L",
    "level": "debug"
}