Add Docker configuration for port 3500

- Add Dockerfile with multi-stage build for production
- Add docker-compose.yml for easy deployment
- Add .dockerignore to exclude unnecessary files
- Add DOCKER_SETUP.md with comprehensive setup guide
- Update next.config.js to enable standalone output mode
- Configure app to run on port 3500
- Keep MySQL server external to Docker

DOCKER_SETUP.md

@@ -0,0 +1,153 @@
+# Docker Setup Guide
+
+This guide explains how to run the Ultimate Lists App using Docker on port 3500.
+
+## Prerequisites
+
+- Docker and Docker Compose installed
+- MySQL server running (external to Docker)
+- Environment variables configured
+
+## Configuration
+
+### 1. Update next.config.js
+
+The application needs to be configured for standalone output. Update your `next.config.js`:
+
+```javascript
+const nextConfig = {
+  output: 'standalone',
+  // ... rest of your config
+}
+```
+
+### 2. Environment Variables
+
+Create a `.env` file in the project root with your MySQL connection details:
+
+```env
+# MySQL Connection (external server)
+DATABASE_URL="mysql://user:password@host:port/database"
+
+# For Docker host machine MySQL, use:
+# DATABASE_URL="mysql://user:password@host.docker.internal:3306/database"
+
+# NextAuth Configuration
+NEXTAUTH_URL=http://localhost:3500
+NEXTAUTH_SECRET=your-secret-key-here
+AUTH_SECRET=your-secret-key-here
+
+# Optional: MySQL connection check variables
+DB_HOST=host.docker.internal
+DB_PORT=3306
+DB_USER=your-db-user
+DB_PASSWORD=your-db-password
+```
+
+**Important:** If your MySQL server is running on your host machine (localhost), use `host.docker.internal` instead of `localhost` in the DATABASE_URL.
+
+### 3. Run Database Migrations
+
+Before building the Docker image, ensure your database schema is up to date:
+
+```bash
+npm install
+npx prisma generate
+npx prisma db push
+```
+
+## Building and Running
+
+### Option 1: Using Docker Compose (Recommended)
+
+```bash
+# Build and start the container
+docker-compose up -d
+
+# View logs
+docker-compose logs -f app
+
+# Stop the container
+docker-compose down
+```
+
+### Option 2: Using Docker directly
+
+```bash
+# Build the image
+docker build -t ultimate-lists-app .
+
+# Run the container
+docker run -d \
+  -p 3500:3500 \
+  --env-file .env \
+  --name ultimate-lists-app \
+  ultimate-lists-app
+
+# View logs
+docker logs -f ultimate-lists-app
+
+# Stop the container
+docker stop ultimate-lists-app
+docker rm ultimate-lists-app
+```
+
+## Accessing the Application
+
+Once running, access the application at:
+- **http://localhost:3500**
+
+## Troubleshooting
+
+### Cannot connect to MySQL
+
+If you see database connection errors:
+
+1. Verify MySQL is running and accessible
+2. Check that you're using `host.docker.internal` instead of `localhost` in DATABASE_URL
+3. Ensure MySQL allows connections from Docker containers
+4. Verify firewall settings allow the connection
+
+### Build fails
+
+If the build fails:
+
+1. Ensure `output: 'standalone'` is set in `next.config.js`
+2. Check that all dependencies are properly installed
+3. Verify Prisma schema is valid
+
+### Port already in use
+
+If port 3500 is already in use:
+
+```bash
+# Find what's using the port
+lsof -i :3500
+
+# Change the port in docker-compose.yml or use a different port:
+docker run -p 3501:3500 ...
+```
+
+## Development vs Production
+
+This Docker setup is configured for production use. For development:
+
+```bash
+# Use the regular dev server
+npm run dev
+```
+
+## Updating the Application
+
+To update after code changes:
+
+```bash
+# Rebuild and restart
+docker-compose up -d --build
+
+# Or with Docker directly
+docker build -t ultimate-lists-app .
+docker stop ultimate-lists-app
+docker rm ultimate-lists-app
+docker run -d -p 3500:3500 --env-file .env --name ultimate-lists-app ultimate-lists-app
+```