---
title: "Discussion on \"🚀 DevOps Roadmap 2025 – Step 4: Docker (Part 2) – Mastering Dockerfile & Docker Images\" | Hashnode"
description: "Discussion on \"🚀 DevOps Roadmap 2025 – Step 4: Docker (Part 2) – Mastering Dockerfile & Docker Images\". In Part 1 of our Docker series, we covered Docker basics, architecture, installation, and important commands.\nNow in Part 2, we’ll deep dive into Dockerfile and Docker Images — the building blocks of containerized applications.  \n📌 1. What is a Dock..."
url: "https://hashnode.com/posts/devops-roadmap-2025-step-4-docker-part-2-mastering-dockerfile-and-docker-images/6899980f2a456b3092f4e280"
---

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# [🚀 DevOps Roadmap 2025 – Step 4: Docker (Part 2) – Mastering Dockerfile & Docker Images](https://harshalsonar.hashnode.dev/devops-roadmap-2025-step-4-docker-part-2-mastering-dockerfile-and-docker-images?utm_source=hashnode&utm_medium=feed)

In Part 1 of our Docker series, we covered Docker basics, architecture, installation, and important commands. Now in Part 2, we’ll deep dive into Dockerfile and Docker Images — the building blocks of containerized applications. 📌 1. What is a Dock...

Aug 11, 2025 · 5 min read · harshalsonar.hashnode.dev  
Read the article

-   [#dockerfile-optimization](https://hashnode.com/tag/dockerfile-optimization)
-   [#dockerfile](https://hashnode.com/tag/dockerfile)
-   [#docker-image](https://hashnode.com/tag/docker-image)
-   [#reduce-docker-image-size](https://hashnode.com/tag/reduce-docker-image-size)
-   [#devops](https://hashnode.com/tag/devops)
-   [#containerization](https://hashnode.com/tag/containerization)
-   [#devops-roadmap-2025](https://hashnode.com/tag/devops-roadmap-2025)

## Written by

[Harshal Sonar](https://hashnode.com/@devopsbyharshal)

@devopsbyharshal

  
[View profile](https://hashnode.com/@devopsbyharshal)

Infrastructure and DevOps Engineer

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