🚀 Docker Image Creation and Pushing to DockerHub: Step-by-Step Guide

VASHANTHA KUMAR K.S — Mon, 28 Apr 2025 15:19:12 +0000

🛠️ Step 1: Install Docker
First, ensure Docker is installed on your machine.
You can install Docker Desktop from https://docs.docker.com/get-docker/.

Check if Docker is installed correctly:

docker --version
🛠️ Step 2: Create a Simple Application
Let's create a simple app. For example, a basic Python app.

Create a folder and files:

mkdir my-docker-app cd my-docker-app touch app.py app.py:

print("Hello, Docker World!")

🛠️ Step 3: Create a Dockerfile
Inside the same folder, create a Dockerfile:
touch Dockerfile

Dockerfile content:

`FROM python:3.10-slim

WORKDIR /app

COPY . .

CMD ["python", "app.py"]

🛠️ Step 4: Build the Docker Image
Now, build the image using:

docker build -t your_dockerhub_username/my-docker-app:latest .

Note: Replace your_dockerhub_username with your actual DockerHub username.

🛠️ Step 5: Run the Docker Container
Test your image by running:

docker run your_dockerhub_username/my-docker-app:latest

You should see:

Hello, Docker World!

🛠️ Step 6: Login to DockerHub
Before pushing the image, log in to your DockerHub account:

docker login

Enter your username and password when prompted.

🛠️ Step 7: Push the Image to DockerHub
Now, push your image:

docker push your_dockerhub_username/my-docker-app:latest
After successful push, you can visit:
👉 https://hub.docker.com/
and find your repository under your profile.

🛠️ Bonus: Pulling and Running the Image from Any Machine
Anyone (including you) can pull and run your image using:

docker pull your_dockerhub_username/my-docker-app:latest docker run your_dockerhub_username/my-docker-app:latest

📌 Conclusion
That's it!
You have successfully:

Created a Docker image

Tested it locally

Logged into DockerHub

Pushed your image to DockerHub!

Now your app can be shared globally or deployed to production. 🚀

Mastering Git Basics: A Beginner's Guide with Practical Commands

VASHANTHA KUMAR K.S — Wed, 23 Apr 2025 16:46:07 +0000

Git is an essential tool for every developer. Whether you're just starting or need a quick refresher, this blog will walk you through the foundational Git commands with practical examples.

🔧 Step-by-Step Git Commands Execution

🧱 1. Initialize a Git repository

git init
Creates a new Git repository in the folder 24MCR124.

📥 2. Add a file to the staging area

git add 24MCR124.txt
Adds 24MCR124.txt to the staging area.

💾 3. Commit the file

git commit -m "Added Personal Details"
Creates a commit with the message "Added Personal Details".

🧐 4. Check Git status

git status
Displays changes in your working directory and staging area.

📜 5. View commit log

git log
Shows the history of commits made.

🌐 6. Add remote GitHub repository

git remote add origin https://github.com/vashanth-kumar/24MCR124.git
Links your local repo to the GitHub remote repo.

🌿 7. Check current branch

git branch
Displays the current branch. Initially it's master.

🧾 8. Rename branch from master to main

git branch -M main
Renames the master branch to main.

👤 9. Set Git global config

git config --global user.email "vashanthakumarks2004@gmail.com"
git config --global user.name "vashanth-kumar"
Sets your Git identity globally.

🚀 10. Push code to remote repo

git push -u origin main
Pushes your changes to GitHub for the first time and sets upstream tracking.

🔁 Pushing Additional Changes
Whenever you modify or add new files:

git add .
git commit -m "Your update message"
git push origin main

✅ Conclusion
Mastering these basic Git commands sets the foundation for version control and collaboration in software development. Happy coding!

DEV Community: VASHANTHA KUMAR K.S

🚀 Docker Image Creation and Pushing to DockerHub: Step-by-Step Guide

Mastering Git Basics: A Beginner's Guide with Practical Commands

🔧 Step-by-Step Git Commands Execution

🧱 1. Initialize a Git repository