Logging example with plain-text and JSON logs.
$ up
Tail the logs in one tab:
$ up logs -f
Hit the plain-text route a few times and you should see the logs.
$ curl `up url`/text/
Hit the json route to see how the JSON logs are translated to the internal format, allowing you to specify fields etc.
$ curl `up url`/json/
JSON logs need at least these fields:
level(string) – severity levelmessage(string) – log message
Optionally:
fields(object) – key/value pairs for contextual information