docker-expert
Docker and containerization expert for building, optimizing, and deploying containers. Use for Dockerfiles, docker-compose, multi-stage builds, and container security.
ソース情報
- リポジトリ
- skeletorflet/opencode-kit
- ソースの最終更新活動
- 2026年3月31日 18:16
- 検出された SKILL.md の言語
- 英語
- スター
- 9
- フォーク
- 1
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SKILL.md
ソースの指示 · 読み取り専用プレビュー- name
- docker-expert
- description
- Docker and containerization expert for building, optimizing, and deploying containers. Use for Dockerfiles, docker-compose, multi-stage builds, and container security.
- license
- MIT
- compatibility
- opencode
- metadata
- {"audience":"developers","category":"devops"}
# Docker Expert
## What I Do
- Write optimized multi-stage Dockerfiles
- Configure docker-compose for development and production
- Implement container security best practices
- Optimize image sizes and build caches
- Set up container networking and volumes
## When to Use Me
- Creating or optimizing Dockerfiles
- Setting up docker-compose environments
- Troubleshooting container issues
- Implementing CI/CD container builds
- Securing container configurations
## Key Principles
1. **Multi-Stage Builds**: Separate build and runtime stages
2. **Minimal Base Images**: Use alpine or distroless when possible
3. **Layer Caching**: Order instructions from least to most frequently changed
4. **Non-Root User**: Never run containers as root in production
5. **.dockerignore**: Exclude node_modules, .git, .env files
## Common Patterns
### Multi-Stage Node.js
```dockerfile
FROM node:20-alpine AS builder
WORKDIR /app
COPY package*.json ./
RUN npm ci --only=production
COPY . .
RUN npm run build
FROM node:20-alpine AS runner
WORKDIR /app
COPY --from=builder /app/dist ./dist
COPY --from=builder /app/node_modules ./node_modules
COPY --from=builder /app/package.json ./
USER node
EXPOSE 3000
CMD ["node", "dist/index.js"]
```
### Docker Compose Development
```yaml
services:
app:
build: .
ports:
- "3000:3000"
volumes:
- .:/app
- /app/node_modules
environment:
- DATABASE_URL=postgresql://user:pass@db:5432/mydb
depends_on:
db:
condition: service_healthy
db:
image: postgres:16-alpine
environment:
POSTGRES_DB: mydb
POSTGRES_USER: user
POSTGRES_PASSWORD: pass
volumes:
- pgdata:/var/lib/postgresql/data
healthcheck:
test: ["CMD-SHELL", "pg_isready -U user"]
interval: 5s
timeout: 5s
retries: 5
volumes:
pgdata:
```
## Validation
After Dockerfile changes:
```bash
docker build --no-cache -t myapp:latest .
docker run --rm myapp:latest
docker scout cves myapp:latest
```
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