Node.js Web Development - Fourth Edition

Capturing stdout and stderr

Important messages can be printed to process.stdout or process.stderr, which can be lost if you don't capture that output. The Twelve Factor model suggests using a system facility to capture these output streams. With Notes, we'll use PM2 for that purpose, which we'll cover in Chapter 10, Deploying Node.js Applications.

The logbook module (https://github.com/jpillora/node-logbook) offers some useful capabilities in term of not only capturing process.stdout and process.stderr, but sending that output to useful places.