Dockerfile

# Build stage
FROM node:20-alpine AS builder

WORKDIR /app

# Copy package files
COPY package*.json ./

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

# Copy source files
COPY tsconfig.json ./
COPY src ./src

# Build TypeScript
RUN npm run build

# Production stage
FROM node:20-alpine AS production

WORKDIR /app

# Copy package files
COPY package*.json ./

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

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

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

USER nodejs

# Expose port
EXPOSE 3000

# Environment variables with defaults
ENV PORT=3000
ENV NODE_ENV=production

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
  CMD wget --no-verbose --tries=1 --spider http://localhost:3000/health || exit 1

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