Add Docker-based production deployment

- Multi-stage Dockerfile with Node builder and nginx server
- Nginx configuration with gzip, security headers, and caching
- Docker Compose setup with health checks
- Updated README with deployment instructions

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.dockerignore

@@ -0,0 +1,34 @@
+# Dependencies
+node_modules
+npm-debug.log*
+
+# Build output
+dist
+
+# Git
+.git
+.gitignore
+
+# IDE
+.vscode
+.idea
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Environment
+.env
+.env.local
+
+# Docker
+Dockerfile
+docker-compose.yml
+.dockerignore
+
+# Documentation
+README.md
+
+# Misc
+*.log
+.cache

Dockerfile

@@ -0,0 +1,37 @@
+# Multi-stage build for production deployment
+
+# Stage 1: Build the application
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+
+# Install dependencies
+RUN npm ci --only=production
+
+# Copy source code
+COPY . .
+
+# Build the application
+RUN npm run build
+
+# Stage 2: Serve with nginx
+FROM nginx:alpine
+
+# Copy built files from builder stage
+COPY --from=builder /app/dist /usr/share/nginx/html
+
+# Copy nginx configuration
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+# Expose port 80
+EXPOSE 80
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD wget --quiet --tries=1 --spider http://localhost/ || exit 1
+
+# Start nginx
+CMD ["nginx", "-g", "daemon off;"]

README.md

@@ -26,6 +26,48 @@ npm run build
 
 The built files will be in the `dist/` directory.
 
+## Docker Deployment
+
+### Using Docker Compose (Recommended)
+
+```bash
+# Build and start the container
+docker-compose up -d
+
+# View logs
+docker-compose logs -f
+
+# Stop the container
+docker-compose down
+```
+
+The game will be available at `http://localhost:8080`
+
+### Using Docker directly
+
+```bash
+# Build the image
+docker build -t whalehunting-game .
+
+# Run the container
+docker run -d -p 8080:80 --name whalehunting whalehunting-game
+
+# View logs
+docker logs -f whalehunting
+
+# Stop and remove container
+docker stop whalehunting
+docker rm whalehunting
+```
+
+### Production Deployment Notes
+
+- The Docker image uses nginx to serve static files
+- Includes gzip compression for better performance
+- Health checks are configured for container monitoring
+- Security headers are enabled
+- Static assets are cached for 1 year
+
 ## Project Structure
 
 ```

docker-compose.yml

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+version: '3.8'
+
+services:
+  whalehunting-game:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    image: whalehunting-game:latest
+    container_name: whalehunting-game
+    ports:
+      - "8080:80"
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "wget", "--quiet", "--tries=1", "--spider", "http://localhost/"]
+      interval: 30s
+      timeout: 3s
+      retries: 3
+      start_period: 5s
+    networks:
+      - whalehunting-network
+
+networks:
+  whalehunting-network:
+    driver: bridge

nginx.conf

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+server {
+    listen 80;
+    server_name _;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # Gzip compression
+    gzip on;
+    gzip_vary on;
+    gzip_min_length 1024;
+    gzip_types text/plain text/css text/xml text/javascript application/javascript application/x-javascript application/xml+rss;
+
+    # Security headers
+    add_header X-Frame-Options "SAMEORIGIN" always;
+    add_header X-Content-Type-Options "nosniff" always;
+    add_header X-XSS-Protection "1; mode=block" always;
+
+    # Cache static assets
+    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+
+    # Serve index.html for all routes (SPA support)
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    # Error pages
+    error_page 404 /index.html;
+}