Building and Sharing Custom Docker Images for Rails Production

Deploying Rails applications to production requires a reliable, repeatable, and secure environment. Containerization simplifies this process, but creating efficient and secure production-ready images demands specific techniques. This text-based course guides you through the foundational concepts of containerization, helping you transition from local development to production-grade deployment workflows. You will start by learning core container terminology and the structure of a Dockerfile. From there, you will progress to writing optimized multi-stage builds, managing environment variables securely, and utilizing modern container registries to share your images safely. What you'll learn: - Understand foundational containerization concepts and terminology specifically for Rails applications - Build optimized, multi-stage Dockerfiles that minimize image size and attack surface - Manage production database connections, secrets, and assets securely within your container workflow - Tag and push custom Rails images to container registries using best practices - Configure modern caching strategies to speed up your automated build pipelines - Implement container security basics, including running applications as non-root users This course is structured as a step-by-step reading and code-analysis guide, starting with foundational definitions before moving into practical configuration scenarios. You will review production-grade configuration files and learn to troubleshoot common build errors. This course is designed for web developers, system administrators, and DevOps beginners who have a basic understanding of Rails but are new to containerizing applications for production environments. No prior DevOps experience is required. Start reading today to build and deploy lightweight, secure Rails containers with confidence.