Creating efficient and secure Docker images is critical to optimizing your containerized applications. In this guide we will walk through some of the best practices for creating Docker images using Dockerfiles and techniques for reducing image size while maintaining functionality and security. Assumptions/Prerequisites To make the most out of this guide, it is assumed that you have: Basic knowledge of Docker and Dockerfile syntax. Familiarity with Node.js applications, including package.json and npm. Docker installed and set up on your machine. A sample Node.js project to test the examples. Best Practices 1. Start with a Minimal Base Image Use lightweight base images like node:alpine to reduce image size. For example: FROM node:alpine 2. Specify an Explicit Version Avoid using latest as the tag for your base image since it can lead to inconsistencies. Instead: FROM node:18.16.0-alpine 3. Minimize the Number of Layers Combine related commands to reduce...