devops-infrastructure

# DevOps & Infrastructure ### When to Load - **Trigger**: Docker, CI/CD pipelines, deployment configuration, monitoring, infrastructure as code - **Skip**: Application logic only with no infrastructure or deployment concerns ## DevOps Workflow Copy this checklist and track progress: ``` DevOps Setup Progress: - [ ] Step 1: Containerize application (Dockerfile) - [ ] Step 2: Set up CI/CD pipeline - [ ] Step 3: Define deployment strategy - [ ] Step 4: Configure monitoring & alerting - [ ] Step 5: Set up environment management - [ ] Step 6: Document runbooks - [ ] Step 7: Validate against anti-patterns checklist ``` ## Docker Best Practices ### Multi-Stage Build ```dockerfile # WRONG: Single stage, bloated image FROM node:20 WORKDIR /app COPY . . RUN npm install RUN npm run build CMD ["node", "dist/index.js"] # Result: 1.2GB image with devDependencies and source code # CORRECT: Multi-stage build FROM node:20-alpine AS builder WORKDIR /app COPY package*.json ./ RUN npm ci COPY . . RUN npm run build FROM node:20-alpine AS runner WORKDIR /app ENV NODE_ENV=production RUN addgroup -g 1001 appgroup && adduser -u 1001 -G appgroup -s /bin/sh -D appuser COPY --from=builder /app/dist ./dist COPY --from=builder /app/node_modules ./node_modules COPY --from=builder /app/package.json ./ USER appuser EXPOSE 3000 CMD ["node", "dist/index.js"] # Result: ~150MB image, no devDependencies, non-root user ``` ### Python Multi-Stage ```dockerfile FROM python:3.12-slim AS builder WORKDIR /a...