The tutorial provides a comprehensive guide on creating and deploying a custom Docker image to Microsoft's Azure Container Registry (ACR) using Node.js, Docker, and CI/CD practices. It outlines the necessary prerequisites, including installations and account setups, and details the process of setting up an ACR, cloning a demo Node.js project, writing a Dockerfile, and building a Docker image. The tutorial further explains how to configure continuous deployment using ACR tasks, GitHub, and CircleCI, ensuring that updates to the application code or Dockerfile automatically trigger new builds. The final steps involve writing a pipeline script with CircleCI to automate the deployment process, emphasizing the integration of GitHub credentials and the use of the gh-pages package to manage branch updates. The tutorial concludes by showcasing the successful deployment, encouraging readers to apply the learned techniques in their projects.