docker-devops

# Docker & DevOps Skill ## Dockerfile Best Practices ### Multi-Stage Build (Node.js) ```dockerfile # Build stage FROM node:20-alpine AS builder WORKDIR /app COPY package*.json ./ RUN npm ci COPY . . RUN npm run build # Production stage FROM node:20-alpine AS runner WORKDIR /app ENV NODE_ENV=production # Non-root user RUN addgroup -g 1001 -S nodejs RUN adduser -S nextjs -u 1001 COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./ COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static COPY --from=builder --chown=nextjs:nodejs /app/public ./public USER nextjs EXPOSE 3000 CMD ["node", "server.js"] ``` ### Multi-Stage Build (Python) ```dockerfile # Build stage FROM python:3.12-slim AS builder WORKDIR /app RUN pip install --no-cache-dir poetry COPY pyproject.toml poetry.lock ./ RUN poetry export -f requirements.txt -o requirements.txt # Production stage FROM python:3.12-slim WORKDIR /app # Non-root user RUN useradd -m -u 1000 appuser COPY --from=builder /app/requirements.txt . RUN pip install --no-cache-dir -r requirements.txt COPY --chown=appuser:appuser . . USER appuser EXPOSE 8000 CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"] ``` --- ## Docker Compose Patterns ### Development Setup ```yaml version: '3.8' services: app: build: context: . dockerfile: Dockerfile.dev volumes: - .:/app - /app/node_modules ports: - "3000:3000" environment: - NODE_ENV=deve...