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Building a Docker Image via Dockerfile

When creating Docker images for websites, applications, and any service that may require any code change in the future, it's best to build in a way that can be quickly and easily rebuilt when any changes occur. Dockerfiles provide an in-platform way to do just that. In this lab, we'll be building a Dockerfile that can generate an image of our website that will make sure that when changes happen with the website code, we won't have to change the Dockerfile itself!

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Path Info

Level
Clock icon Beginner
Duration
Clock icon 15m
Last updated
Clock icon Sep 02, 2025

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Table of Contents

  1. Challenge

    Create the Dockerfile

    The Dockerfile can be created in a number of ways, so long as it meets expectations. The following nine steps are suggested:

    1. Define the desired container.
    2. Update the packages on the container.
    3. Install Nginx.
    4. Update the Nginx configuration.
    5. Create the location of the website files.
    6. Set the working directory to that of the website.
    7. Copy over website files, ensuring that Nginx is the owner.
    8. Expose port 80.
    9. Run Nginx at /tmp/nginx.pid; ensure Nginx is not set to run as a daemon.

  2. Challenge

    Test the Image

    1. Use docker build to generate an image based on the provided Dockerfile
    2. Create a web01 container based on the image, ensuring port 80 on the container maps to 80 on the host and the container is launched in the background.
Pluralsight Skills - Labs - Pluralsight
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Pluralsight Skills

Pluralsight Skills gives leaders confidence they have the skills needed to execute technology strategy. Technology teams can benchmark expertise across roles, speed up release cycles and build reliable, secure products. By leveraging our expert content, skill assessments and one-of-a-kind analytics, keep up with the pace of change, put the right people on the right projects and boost productivity. It's the most effective path to developing tech skills at scale.

What's a lab?

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

Provided environment for hands-on practice

We will provide the credentials and environment necessary for you to practice right within your browser.

Guided walkthrough

Follow along with the author’s guided walkthrough and build something new in your provided environment!

Did you know?

On average, you retain 75% more of your learning if you get time for practice.
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