FROM node:18-alpine

# Install dependencies for sharp and canvas
RUN apk add --no-cache \
    python3 \
    make \
    g++ \
    cairo-dev \
    jpeg-dev \
    pango-dev \
    giflib-dev

WORKDIR /app

# Copy package files
COPY package*.json ./

# Install dependencies
RUN npm ci --only=production

# Copy application code
COPY . .

# Create directories
RUN mkdir -p logs data/models data/reference-images

# Expose port
EXPOSE 3450

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
    CMD wget --no-verbose --tries=1 --spider http://localhost:3450/health || exit 1

# Start application
CMD ["node", "src/index.js"]