How to build a docker image using Dockerfile (Step-by-step Guide 2026)
In this video, you’ll learn how to build a Docker image using a Dockerfile and understand the core instructions used to create custom Docker images. Dockerfiles are the foundation of containerized applications and modern DevOps workflows. This tutorial walks you through writing a Dockerfile step by step, explaining each instruction, and then building a Docker image from it in a practical, hands-on way.
🔹 What You Will Learn
In this Docker tutorial, you will learn how to:
✅Understand what a Dockerfile is and how it works
✅Write a Dockerfile to build a custom Docker image
✅Learn common Dockerfile instructions such as FROM, RUN, COPY, and CMD
✅Build a Docker image using the Dockerfile
✅Follow Dockerfile best practices for clean and efficient images
✅Apply Docker image building concepts in real DevOps workflows
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