A Note on Docker

This is a step-by-step guide to install Docker on Linux Mint 18.3 Cinnamon 64-bit, including removing previous versions, adding the Docker repository, and creating a Docker user group. It also covers managing Docker daemon auto-start, pulling a PostgreSQL image from the Docker registry, creating and managing containers, validating a PostgreSQL container using pgAdmin, building Docker images for Node.js applications, and optimizing image size using NGINX to host web content.