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README.md

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-# dockerized-service-deployment
+# Dockerized Service Deployment
+
+This project implements a complete CI/CD pipeline for deploying a Dockerized Node.js service using Ansible and GitHub Actions. It follows the project requirements from [roadmap.sh's Dockerized Service Deployment project](https://roadmap.sh/projects/dockerized-service-deployment) with some additional enhancements.
+
+## Project Overview
+
+We built a Node.js service that:
+- Serves a "Hello, world!" message at the root endpoint
+- Has a protected `/secret` endpoint with Basic Authentication
+- Includes a `/health` endpoint for health checks
+- Is containerized using Docker
+- Is deployed using Ansible and GitHub Actions
+- Uses Nginx as a reverse proxy
+
+## Implementation Details
+
+### 1. Node.js Application (`/app`)
+```javascript
+// Basic Express app with three endpoints:
+- GET /         → Returns "Hello, world!"
+- GET /secret   → Protected endpoint (Basic Auth)
+- GET /health   → Health check endpoint
+```
+
+### 2. Docker Configuration
+- Created `Dockerfile` for the Node.js application
+- Multi-stage build for optimized image size
+- Uses Node.js 18 Alpine base image
+- Proper security practices (non-root user, minimal dependencies)
+
+### 3. Ansible Setup (`/ansible`)
+- Created playbooks for automated deployment:
+  - `docker-setup.yml`: Installs Docker and Nginx
+  - `inventory.ini`: Defines control and target nodes
+  - `templates/nginx.conf.j2`: Nginx configuration template
+
+### 4. GitHub Actions Workflow (`.github/workflows`)
+- Automated CI/CD pipeline that:
+  - Builds Docker image
+  - Pushes to GitHub Container Registry
+  - Deploys to target EC2 instance
+  - Uses secrets for secure credential management
+
+### 5. Additional Features
+- **Enhanced Security**:
+  - UFW firewall configuration
+  - Proper permission management
+  - Environment variable handling
+- **Infrastructure Management**:
+  - Separate control and target nodes
+  - Nginx reverse proxy setup
+  - Docker container lifecycle management
+
+## Project Structure
+```
+dockerized-service-deployment/
+├── app/
+│   ├── app.js              # Main application code
+│   ├── Dockerfile          # Docker configuration
+│   ├── package.json        # Node.js dependencies
+│   └── .env.example        # Environment variables template
+├── ansible/
+│   ├── docker-setup.yml    # Ansible playbook
+│   ├── inventory.ini       # Server inventory
+│   └── templates/
+│       └── nginx.conf.j2   # Nginx configuration template
+├── .github/
+│   └── workflows/
+│       └── deploy.yml      # GitHub Actions workflow
+└── README.md              # Project documentation
+```
+
+## Implementation Steps
+
+1. **Application Development**
+   ```bash
+   # Initialize Node.js project
+   npm init -y
+   npm install express basic-auth
+   ```
+
+2. **Docker Configuration**
+   ```dockerfile
+   # Multi-stage build
+   FROM node:18-alpine AS builder
+   WORKDIR /app
+   COPY package*.json ./
+   RUN npm ci
+   COPY . .
+
+   FROM node:18-alpine
+   WORKDIR /app
+   COPY --from=builder /app .
+   EXPOSE 3000
+   CMD ["node", "app.js"]
+   ```
+
+3. **Ansible Setup**
+   ```yaml
+   # docker-setup.yml
+   - name: Setup Docker and Nginx
+     hosts: target
+     become: yes
+     tasks:
+       - name: Install Docker
+       - name: Configure Nginx
+       - name: Deploy application
+   ```
+
+4. **GitHub Actions Configuration**
+   ```yaml
+   # deploy.yml
+   name: Deploy Dockerized Service
+   on:
+     push:
+       branches: [ main ]
+   jobs:
+     build-and-deploy:
+       runs-on: ubuntu-latest
+       steps:
+         - uses: actions/checkout@v2
+         - name: Build and push Docker image
+         - name: Deploy to target node
+   ```
+
+## Proof of Implementation
+
+Here are the test results showing our working implementation:
+
+1. **Health Check Endpoint**
+```json
+// GET http://34.238.146.221:3000/health
+{"status":"healthy","timestamp":"2025-02-10T09:58:17.768Z"}
+```
+
+2. **Root Endpoint**
+```json
+// GET http://34.238.146.221:3000/
+{"message":"Hello, world!","timestamp":"2025-02-10T09:58:26.676Z"}
+```
+
+3. **Protected Endpoint**
+```json
+// GET http://34.238.146.221:3000/secret (with Basic Auth)
+{"message":"'This is a secret message'","timestamp":"2025-02-10T09:58:35.283Z"}
+```
+
+## Learning Outcomes
+
+1. **Docker Best Practices**
+   - Multi-stage builds
+   - Security considerations
+   - Environment variable management
+
+2. **Ansible Automation**
+   - Infrastructure as Code
+   - Configuration management
+   - Role-based automation
+
+3. **CI/CD with GitHub Actions**
+   - Automated workflows
+   - Secret management
+   - Container registry integration
+
+4. **Security Considerations**
+   - Basic Authentication
+   - Environment variables
+   - Firewall configuration (UFW)
+   - Nginx as reverse proxy
+
+5. **Infrastructure Management**
+   - AWS EC2 instance management
+   - Network security groups
+   - SSH key management
+
+## Challenges Faced and Solutions
+
+1. **Port Access Issues**
+   - Problem: Application not accessible after deployment
+   - Solution: Configured both UFW and AWS security groups
+
+2. **Process Management**
+   - Problem: Port conflicts with existing processes
+   - Solution: Proper process cleanup and Docker container management
+
+3. **GitHub Actions Authentication**
+   - Problem: Container registry access
+   - Solution: Proper secret management and permissions
+
+## Project Page URL
+[roadmap.sh Dockerized Service Deployment](https://roadmap.sh/projects/dockerized-service-deployment)
+
+## Future Improvements
+1. Add HTTPS support with Let's Encrypt
+2. Implement container health checks
+3. Add monitoring and logging solutions
+4. Implement blue-green deployment strategy
+5. Add automated backups and disaster recovery