Generate a Dockerfile for Django

# Pin to specific version in production, e.g., node:22.11-alpine
# Stage 1: Install dependencies
FROM node:22-alpine AS deps
WORKDIR /app
COPY package.json package-lock.json ./
RUN npm ci
 
# Stage 2: Build (if applicable)
FROM node:22-alpine AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .
RUN npm run build
 
# Stage 3: Production image
FROM node:22-alpine AS runner
 
LABEL org.opencontainers.image.authors="team@example.com" \
      org.opencontainers.image.version="1.0.0" \
      org.opencontainers.image.description="Production image"
 
WORKDIR /app
ENV NODE_ENV=production
 
# Copy only production dependencies and built output
COPY package.json package-lock.json ./
RUN npm ci --omit=dev
COPY --from=builder /app/dist ./dist
 
RUN apk add --no-cache curl
 
# Create non-root user for security
RUN addgroup -S appusergroup && adduser -S appuser -G appusergroup
USER appuser
 
EXPOSE 3000
 
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD curl -f http://localhost:3000/ || exit 1
 
# Use ENTRYPOINT for proper signal handling (PID 1)
ENTRYPOINT ["node"]
CMD ["dist/index.js"]