The guest post by Armando Canals, co-founder at packagecloud, provides a comprehensive guide on setting up a continuous deployment pipeline for NodeJS projects using CircleCI 2.0. It details the configuration process of CircleCI to automate testing and deployment of npm packages to both public and private registries. The post explains the significance of npm as a package manager for Node.js, emphasizing its role in distributing JavaScript code, and outlines steps such as creating a .circleci/config.yml file, setting environment variables, and defining jobs for testing and deploying. The guide also highlights the use of workspaces to share data between jobs and ensures deployments occur only when a tagged commit is pushed. By leveraging CircleCI, developers can automate their software distribution pipeline, reducing errors and improving efficiency.