Dockerfile

# Multi-stage build for Node.js backend
FROM node:22-alpine AS builder

WORKDIR /app

# Install pnpm
RUN corepack enable && corepack prepare pnpm@latest --activate

# Copy package files
COPY package.json pnpm-lock.yaml ./

# Install dependencies
RUN pnpm install --frozen-lockfile

# Copy source code
COPY . .

# Build the application
RUN pnpm build

# Production stage
FROM node:22-alpine AS production

WORKDIR /app

# Install pnpm
RUN corepack enable && corepack prepare pnpm@latest --activate

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

# Copy package files
COPY package.json pnpm-lock.yaml ./

# Install only production dependencies
RUN pnpm install --frozen-lockfile --prod

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

# Copy instrumentation.js (needed for OTEL auto-instrumentation)
COPY --from=builder /app/instrumentation.js ./instrumentation.js

# Change ownership to non-root user
RUN chown -R typelets:nodejs /app
USER typelets

# Expose port
EXPOSE 3000

# Health check using new metrics endpoint
HEALTHCHECK --interval=30s --timeout=3s --start-period=30s --retries=3 \
    CMD node -e "http.get('http://localhost:3000/health', (res) => process.exit(res.statusCode === 200 ? 0 : 1))" || exit 1

# Start the application
CMD ["pnpm", "start"]