Dockerfile

# Multi-stage build for production optimization
FROM node:18-alpine AS builder

# Set working directory
WORKDIR /app

# Copy package files
COPY package*.json ./
COPY tsconfig.json ./

# Install all dependencies (including dev dependencies for building)
RUN npm ci

# Copy source code
COPY src/ ./src/

# Build the application
RUN npm run build

# Production stage
FROM node:18-alpine AS production

# Create app user for security
RUN addgroup -g 1001 -S nodejs && \
    adduser -S appuser -u 1001

# Set working directory
WORKDIR /app

# Copy package files
COPY package*.json ./

# Install only production dependencies
RUN npm ci --only=production && \
    npm cache clean --force

# Copy built application from builder stage
COPY --from=builder /app/dist ./dist

# Copy any additional assets if needed
COPY --chown=appuser:nodejs package*.json ./

# Create logs directory
RUN mkdir -p /app/logs && chown -R appuser:nodejs /app

# Switch to non-root user
USER appuser

# Expose port
EXPOSE 3000

# Add health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
    CMD wget --no-verbose --tries=1 --spider http://localhost:3000/api/health || exit 1

# Set environment variables
ENV NODE_ENV=production
ENV PORT=3000

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