Dockerfile

# Multi-stage build for smaller, more secure production image
FROM node:20-alpine AS builder

# Install security updates
RUN apk upgrade --no-cache

WORKDIR /app

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

# Install dependencies (including devDependencies for build)
RUN npm ci --ignore-scripts

# Copy source code
COPY src ./src

# Build TypeScript
RUN npm run build:server

# Prune dev dependencies
RUN npm prune --production

# Production stage
FROM node:20-alpine

# Add security updates and dumb-init for proper signal handling
RUN apk upgrade --no-cache && \
    apk add --no-cache dumb-init

WORKDIR /app

# Copy package files for metadata
COPY package*.json ./

# Copy production dependencies from builder
COPY --from=builder /app/node_modules ./node_modules

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

# Copy configuration directory (will be mounted/overridden in production)
COPY config ./config

# Create non-root user with specific UID/GID
RUN addgroup -g 1001 -S nodejs && \
    adduser -S nodejs -u 1001 -G nodejs

# Create necessary directories with proper permissions
RUN mkdir -p /app/logs /app/data && \
    chown -R nodejs:nodejs /app

# Switch to non-root user
USER nodejs

# Expose port
EXPOSE 3000

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=10s --retries=3 \
  CMD node -e "require('http').get('http://localhost:3000/health', (r) => {process.exit(r.statusCode === 200 ? 0 : 1)})"

# Add labels for better container management
LABEL maintainer="your-email@example.com" \
      version="1.0.0" \
      description="SOAP-REST Proxy - Enterprise API Gateway" \
      org.opencontainers.image.source="https://github.com/yourusername/soap-rest-proxy"

# Use dumb-init to handle signals properly
ENTRYPOINT ["dumb-init", "--"]

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