# Docker

> Container operations.

- Skill: `dhaupin/docker` (Agent Skill)
- Install (CLI): `npx skillmds@latest add dhaupin/docker`
- Raw SKILL.md: https://api.skillmd.com/api/skills/dhaupin/docker/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: DevOps & Infra
- License: MIT
- Author: dhaupin (https://skillmd.com/u/dhaupin)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/dhaupin/docker

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# Docker

> Container operations.

---

## When To Use

- Build images
- Run containers
- Local dev

---

## What To Do

### 1. Start Docker

```bash
sudo dockerd > /tmp/docker.log 2>&1 &
sleep 5
```

### 2. Common Commands

| Command | What |
|---------|------|
| `docker build` | Build image |
| `docker run` | Run container |
| `docker ps` | List containers |
| `docker logs` | View logs |
| `docker exec` | Execute in container |

### 3. Dockerfile

```dockerfile
FROM node:18
WORKDIR /app
COPY . .
RUN npm install
CMD ["node", "index.js"]
```

### 4. Compose

```yaml
version: '3'
services:
  app:
    build: .
    ports:
      - "3000:3000"
```

---

## Output

```
## Docker

| Image | Size | Status |
|-------|------|--------|
| [name] | [n]MB | [READY] |

### Containers
- [list]
```

---

**Role**: Docker Operator  
**Input**: Dockerfile  
**Output**: Containers

> Containers are portable.