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From docker-development
Use when working with ANY Docker task: writing Dockerfiles, configuring docker-compose/compose.yml, multi-stage builds, docker-bake.hcl, container security audits, .dockerignore optimization, or CI/CD container testing. Triggers on: Dockerfile, docker-compose, container, image build, multi-stage, docker bake, compose.
npx claudepluginhub netresearch/claude-code-marketplace --plugin docker-developmentHow this skill is triggered — by the user, by Claude, or both
Slash command
/docker-development:docker-developmentThis skill is limited to the following tools:
The summary Claude sees in its skill listing — used to decide when to auto-load this skill
Patterns for building, testing, and deploying Docker containers.
Searches, retrieves, and installs Agent Skills from prompts.chat registry using MCP tools like search_skills and get_skill. Activates for finding skills, browsing catalogs, or extending Claude.
Provides behavioral guidelines to reduce common LLM coding mistakes, focusing on simplicity, surgical changes, assumption surfacing, and verifiable success criteria.
Provides UI/UX resources: 50+ styles, color palettes, font pairings, guidelines, charts for web/mobile across React, Next.js, Vue, Svelte, Tailwind, React Native, Flutter. Aids planning, building, reviewing interfaces.
Share bugs, ideas, or general feedback.
Patterns for building, testing, and deploying Docker containers.
FROM node:20-alpine AS builder
WORKDIR /app
COPY package*.json ./
RUN npm ci --only=production
COPY . .
FROM node:20-alpine
RUN addgroup -g 1001 app && adduser -u 1001 -G app -D app
USER app
COPY --from=builder /app .
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
CMD wget -qO- http://localhost:3000/health || exit 1
CMD ["node", "server.js"]
FROM golang:1.22-alpine AS builder
WORKDIR /app
COPY go.* ./
RUN go mod download
COPY . .
RUN CGO_ENABLED=0 go build -o /app/server .
FROM gcr.io/distroless/static:nonroot
COPY --from=builder /app/server /server
CMD ["/server"]
RUN apt-get update && \
apt-get install -y --no-install-recommends curl && \
rm -rf /var/lib/apt/lists/*
COPY package*.json ./
RUN npm ci
COPY . .
Manifests before source keeps install layers cached on source-only changes.
RUN --mount=type=secret,id=ssh_key,dst=/root/.ssh/id_rsa git clone git@github.com:org/repo.git
ENV/ARG/COPY secrets persist in docker history. Use --mount=type=secret.
target "app" {
platforms = ["linux/amd64", "linux/arm64"]
cache-from = ["type=gha"]
cache-to = ["type=gha,mode=max"]
}
| Anti-pattern | Fix |
|---|---|
FROM image:latest | Pin version: image:1.2.3-alpine |
No USER directive | adduser + USER appuser |
chmod 777 | Use specific permissions: chmod 550 |
privileged: true in compose | Remove or use specific cap_add |
volumes: [/:/host] | Mount only needed paths |
ports: ["0.0.0.0:3000:3000"] | Bind to 127.0.0.1:3000:3000 |
ENV DB_PASSWORD=secret | Use --mount=type=secret or compose secrets |
docker run --rm --entrypoint php myimage -vdocker run --rm --add-host backend:127.0.0.1 nginx-image nginx -tcp .env.example .env before docker compose config.env.example, README, docs from scannersExclude: .git, node_modules/vendor, .env*, *.pem, *.key
depends_on with condition: service_healthy + healthcheck with start_period for startup orderingnetworks with internal: true for database isolation from external accessprofiles: [debug] for optional services that only start with --profile debugreferences/ci-testing.md -- CI testing patterns for Docker imagesreferences/dind-testing-patterns.md -- Docker-in-Docker (DinD) testing patterns