From Flask App to CI/CD Pipeline with GitHub Actions & Docker Hub

DevOps is all about bridging development and operations. For this project, I decided to get hands on by containerizing a simple web application and automating its deployment pipeline. Here’s how I built a complete CI/CD workflow from scratch using Python + Flask for the web app Docker for containerization GitHub for version control GitHub Actions for CI/CD Docker Hub for image hosting ✅ Step 1: Create a Simple Flask Application 1.1 Set up a project folder 1.2 Create a virtual environment and install Flask 1.3 Create your Flask app Create a file called app.py and paste this in: 1.4 Run the app locally Then open your browser and go to http://localhost:5000 ✅ Step 2: Containerize the Application 2.1 Create a Dockerfile Create a file called Dockerfile (no extension) in the root folder: 2.2 Create .dockerignore Create a file named .dockerignore: 2.3 Build the Docker image 2.4 Run the container Open http://localhost:5000 in your browser again. You should see Hello DevOps! ✅ Step 3: Set Up Version Control Next, I pushed the project to GitHub to manage changes and integrate CI/CD workflows. git init git add . git commit -m "Run" git remote add origin https://github.com/adeleke123/flask-devops-app.git git push -u origin main

git init
git add .
git commit -m "Run"
git remote add origin https://github.com/adeleke123/flask-devops-app.git
git push -u origin main