Create docker-compose-setup.md

docker-compose-setup.md

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+# Docker Compose Setup Guide
+
+This guide will help you set up and run the Node.js application using Docker Compose.
+
+## Prerequisites
+
+- Docker installed on your system
+- Docker Compose installed (usually comes with Docker Desktop)
+- Git (to clone the repository)
+
+## Quick Start
+
+1. Clone the repository:
+   ```bash
+   git clone https://github.com/wearedood/node.git
+   cd node
+   ```
+
+2. Build and start the services:
+   ```bash
+   docker-compose up --build
+   ```
+
+3. The application will be available at `http://localhost:3000`
+
+## Configuration
+
+### Environment Variables
+
+Create a `.env` file in the root directory with the following variables:
+
+```env
+NODE_ENV=development
+PORT=3000
+DATABASE_URL=mongodb://mongo:27017/nodeapp
+REDIS_URL=redis://redis:6379
+```
+
+### Docker Compose Services
+
+The `docker-compose.yml` file defines the following services:
+
+#### Web Application
+- **Service**: `app`
+- **Port**: 3000
+- **Dependencies**: MongoDB, Redis
+- **Volume**: Source code mounted for development
+
+#### Database
+- **Service**: `mongo`
+- **Port**: 27017
+- **Volume**: Persistent data storage
+
+#### Cache
+- **Service**: `redis`
+- **Port**: 6379
+- **Volume**: Persistent cache storage
+
+## Development Workflow
+
+### Starting Services
+```bash
+# Start all services
+docker-compose up
+
+# Start services in background
+docker-compose up -d
+
+# Start specific service
+docker-compose up app
+```
+
+### Stopping Services
+```bash
+# Stop all services
+docker-compose down
+
+# Stop and remove volumes
+docker-compose down -v
+```
+
+### Viewing Logs
+```bash
+# View logs for all services
+docker-compose logs
+
+# View logs for specific service
+docker-compose logs app
+
+# Follow logs in real-time
+docker-compose logs -f app
+```
+
+### Running Commands
+```bash
+# Execute command in running container
+docker-compose exec app npm install
+
+# Run one-time command
+docker-compose run app npm test
+```
+
+## Production Deployment
+
+For production deployment, use the production compose file:
+
+```bash
+docker-compose -f docker-compose.prod.yml up -d
+```
+
+### Production Considerations
+
+1. **Environment Variables**: Set production values in `.env.production`
+2. **Volumes**: Use named volumes for data persistence
+3. **Networks**: Configure proper network isolation
+4. **Health Checks**: Ensure services have health check endpoints
+5. **Resource Limits**: Set appropriate CPU and memory limits
+
+## Troubleshooting
+
+### Common Issues
+
+1. **Port Already in Use**
+   ```bash
+   # Check what's using the port
+   lsof -i :3000
+
+   # Kill the process or change the port in docker-compose.yml
+   ```
+
+2. **Database Connection Issues**
+   ```bash
+   # Check if MongoDB is running
+   docker-compose ps mongo
+
+   # View MongoDB logs
+   docker-compose logs mongo
+   ```
+
+3. **Permission Issues**
+   ```bash
+   # Fix file permissions
+   sudo chown -R $USER:$USER .
+   ```
+
+### Rebuilding Services
+
+If you make changes to the Dockerfile or dependencies:
+
+```bash
+# Rebuild specific service
+docker-compose build app
+
+# Rebuild all services
+docker-compose build
+
+# Force rebuild without cache
+docker-compose build --no-cache
+```
+
+## Useful Commands
+
+```bash
+# View running containers
+docker-compose ps
+
+# View resource usage
+docker-compose top
+
+# Remove unused images and containers
+docker system prune
+
+# View service configuration
+docker-compose config
+```
+
+## File Structure
+
+```
+.
+├── docker-compose.yml          # Main compose file
+├── docker-compose.prod.yml     # Production compose file
+├── Dockerfile                  # Application container definition
+├── .env                        # Environment variables
+├── .env.production            # Production environment variables
+└── docs/
+    └── docker-compose-setup.md # This documentation
+```
+
+## Next Steps
+
+- Review the `docker-compose.yml` file to understand the service configuration
+- Customize environment variables for your specific needs
+- Set up CI/CD pipeline for automated deployments
+- Configure monitoring and logging for production environments
+
+For more information, refer to the [Docker Compose documentation](https://docs.docker.com/compose/).