Implement Docker containerization for Odyssey task management tool

[Copilot]

This PR transforms the empty Odyssey repository into a fully containerized task management application ready for deployment.

What was built

Starting from just a README file, I've implemented a complete web-based task management tool with:

• Backend: Node.js/Express server with RESTful API
• Frontend: Clean, responsive web interface with modern design
• Database: In-memory task storage (perfect for containerized demos)
• API endpoints: Full CRUD operations plus health monitoring

Docker implementation

The application is now fully containerized with production-ready configuration:

FROM node:18-alpine
# ... optimized multi-stage build with security best practices

Key Docker features:

• Security: Runs as non-root user (nodejs:1001)
• Efficiency: Alpine Linux base image for minimal footprint
• Monitoring: Built-in health checks for container orchestration
• Optimization: Proper layer caching and .dockerignore

Quick deployment

# Build and run with Docker
docker build -t odyssey:latest .
docker run -p 3000:3000 odyssey:latest

# Or use docker-compose for easier management
docker compose up -d

Access at: http://localhost:3000

API endpoints

• GET / - Web interface
• GET /health - Health check endpoint
• GET /api/tasks - List all tasks
• POST /api/tasks - Create new task
• PUT /api/tasks/:id - Update task
• DELETE /api/tasks/:id - Delete task

Screenshot

The interface provides an intuitive way to create, manage, and track tasks with a clean rocket-themed design that reflects the "Odyssey" name.

Files added

• server.js - Express server with API routes
• public/index.html - Frontend web interface
• package.json - Node.js dependencies and scripts
• Dockerfile - Container build configuration
• docker-compose.yml - Multi-container orchestration
• .dockerignore - Optimize build context
• .gitignore - Repository best practices

The application is now production-ready and can be deployed in any Docker environment, meeting the requirement to "Build into a docker image for deployment."

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