This appender allows adding tags to any call to the logger.
Documentation added:
Loggly Appender. Sends logging events to Loggly using node-loggly,
optionally setting tags.
This appender will scan the msg from the logging event, and pull out
any argument of the shape `{ tags: [] }` so that it's possible
to add tags in a normal logging call. If an object contains tags and
other members, that object is not used for loggly tagging.
For example:
logger.info({ tags: ['my-tag-1', 'my-tag-2'] }, 'Some message', someObj, ...)
And then this appender will remove the tags param and append it to the config.tags.
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