Docker Hub as image registry - Mini Project: Build & Apply

Docker Hub as image registry

📖 Scenario: You are working on a small project where you need to share your Docker image with your team. Docker Hub is a popular online service where you can store and share Docker images easily.In this project, you will create a simple Docker image, tag it correctly for Docker Hub, and push it to your Docker Hub repository.

🎯 Goal: Build a Docker image from a simple Dockerfile, tag it with your Docker Hub username and repository name, and push it to Docker Hub so others can pull and use it.

📋 What You'll Learn

Create a Dockerfile with a simple base image

Build a Docker image named myapp

Tag the image with your Docker Hub username and myapp repository

Push the tagged image to Docker Hub

💡 Why This Matters

🌍 Real World

Developers and teams use Docker Hub to share container images easily across different environments and collaborators.

💼 Career

Knowing how to build, tag, and push Docker images to Docker Hub is a fundamental skill for DevOps engineers and developers working with containerized applications.

1

Create a simple Dockerfile

Create a file named Dockerfile with the following content:
FROM alpine:latest
CMD ["echo", "Hello from Docker Hub project!"]

Docker

# Create a Dockerfile with FROM alpine:latest and CMD echo Hello from Docker Hub project!
# Your code here

Need a hint?

Use FROM alpine:latest as the base image and CMD ["echo", "Hello from Docker Hub project!"] to print a message.

2

Build the Docker image

Build a Docker image named myapp using the Dockerfile in the current directory with the command:
docker build -t myapp .

Docker

FROM alpine:latest
CMD ["echo", "Hello from Docker Hub project!"]
# Run docker build -t myapp . to build the image
# Your code here

Need a hint?

Use docker build -t myapp . to build the image with the tag myapp.

3

Tag the image for Docker Hub

Tag the image myapp with your Docker Hub username yourusername and repository myapp using:
docker tag myapp yourusername/myapp:latest
Replace yourusername with your actual Docker Hub username.

Docker

FROM alpine:latest
CMD ["echo", "Hello from Docker Hub project!"]
# Command to build image:
docker build -t myapp .
# Tag the image for Docker Hub
# Your code here

Need a hint?

Use docker tag myapp yourusername/myapp:latest to tag the image for Docker Hub.

4

Push the image to Docker Hub

Push the tagged image yourusername/myapp:latest to Docker Hub using:
docker push yourusername/myapp:latest
Make sure you are logged in to Docker Hub with docker login before pushing.

Docker

FROM alpine:latest
CMD ["echo", "Hello from Docker Hub project!"]
# Command to build image:
docker build -t myapp .
# Tag the image for Docker Hub
docker tag myapp yourusername/myapp:latest
# Push the image to Docker Hub
# Your code here

Need a hint?

Use docker push yourusername/myapp:latest to upload the image to Docker Hub.