Dockerfile

# Production Dockerfile for Auth API
# Multi-stage build for optimized final image size

# Stage 1: Build
ARG NODE_VERSION=24-alpine
FROM node:${NODE_VERSION} AS builder

WORKDIR /app

# Copy package files
COPY package*.json ./

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

# Copy source code
COPY . .

# Build TypeScript
RUN npm run build

# Stage 2: Production
FROM node:${NODE_VERSION} AS production

# Install dumb-init for proper signal handling
RUN apk add --no-cache dumb-init

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

WORKDIR /app

# Copy package files
COPY package*.json ./

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

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

# Switch to non-root user
USER nodejs

# Expose API port
EXPOSE 3002

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
    CMD node -e "require('http').get('http://localhost:3002/health', (r) => {process.exit(r.statusCode === 200 ? 0 : 1)})"

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

# Start production server with OTEL instrumentation
CMD ["node", "--import", "./dist/instrumentation.js", "dist/index.js"]