Docker

Docker Skill

Production Docker — from optimised Dockerfiles to multi-service compose stacks and CI/CD integration.

RULE: Show Dockerfile and compose files before building. Warn before any docker system prune or volume removal.

🚧 Status: Stub — implementation pending

This reference skill has the structure but the snippet content is still being filled in (you'll see <!-- TODO --> placeholders below). It activates and tells Claude the topic exists, but won't yield deep snippets yet.

Want to help? Pick any TODO, write the snippet, open a PR. See CONTRIBUTING.md. Each contribution moves the skill closer to "Ready" status.

Capabilities

Dockerfile Best Practices

docker-compose Setup

Multi-Stage Builds

Container Networking

Volume Management

Docker in CI/CD

Templates

Node.js multi-stage

# Stage 1: build
FROM node:20-alpine AS builder
WORKDIR /app
COPY package*.json ./
RUN npm ci
COPY . .
RUN npm run build

# Stage 2: runtime
FROM node:20-alpine AS runner
RUN addgroup -S app && adduser -S app -G app
WORKDIR /app
COPY --from=builder --chown=app:app /app/dist ./dist
COPY --from=builder --chown=app:app /app/node_modules ./node_modules
COPY --from=builder --chown=app:app /app/package.json .
USER app
EXPOSE 3000
HEALTHCHECK --interval=30s --timeout=5s CMD wget -qO- http://localhost:3000/health || exit 1
CMD ["node", "dist/index.js"]

Python multi-stage

FROM python:3.12-slim AS builder
WORKDIR /app
RUN pip install uv
COPY requirements.txt .
RUN uv pip install --system -r requirements.txt

FROM python:3.12-slim AS runner
RUN useradd -m app
WORKDIR /app
COPY --from=builder /usr/local/lib/python3.12 /usr/local/lib/python3.12
COPY --chown=app:app . .
USER app
EXPOSE 8000
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]

.dockerignore

node_modules/
.venv/
__pycache__/
*.pyc
.git/
.env
.env.*
dist/
build/
*.log
README.md
.DS_Store