How do I install the Docker skill?

Run npx skillmds add majiayu000/docker-10 in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

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Is Docker free to use?

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Who published Docker?

majiayu000 (@majiayu000) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Docker by majiayu000 — Agent Skill

Name: Docker
Rating: 4.2 (5 reviews)
Author: majiayu000

Docker

Configures containerization with Docker and Docker Compose for VanDaemon. Use when: building containers, configuring docker-compose, deploying to Docker environments, troubleshooting container networking, or setting up multi-container applications.

majiayu000 fdc49a0 2 files · 3.3 KB Updated Sep 9, 2026 567 repo stars

File contents

Docker Skill

VanDaemon uses a multi-container architecture with separate API and Web containers for local development, plus a combined single-container deployment for Fly.io. The API runs on .NET 10, the Web frontend uses nginx to serve Blazor WASM static files and proxy API/WebSocket requests. Data persists via Docker volumes for JSON file storage.

Quick Start

Start Development Environment

# From solution root
docker compose up -d

# View logs
docker compose logs -f

# Rebuild after code changes
docker compose up --build

Access Points

Service	URL	Purpose
Web UI	http://localhost:8080	Blazor WASM frontend
API	http://localhost:5000	REST API + Swagger
Health	http://localhost:5000/health	Container health check
SignalR	ws://localhost:5000/hubs/telemetry	Real-time updates

Key Concepts

Concept	Usage	Example
Multi-stage builds	Minimize image size	`FROM sdk AS build` → `FROM aspnet AS final`
Health checks	Container orchestration	`HEALTHCHECK CMD curl /health`
Volume mounts	Persist JSON data	`api-data:/app/data`
Bridge network	Inter-container comms	`http://api:80` not `localhost:5000`
Supervisor	Multi-process container	Combined nginx + API for Fly.io

Common Patterns

Container Networking

When: Containers need to communicate

# docker-compose.yml
services:
  web:
    depends_on:
      api:
        condition: service_healthy
    # Use container name, not localhost
    environment:
      - API_BASE_URL=http://api:80

Volume Persistence

When: Data must survive container restarts

volumes:
  api-data:
  api-logs:

services:
  api:
    volumes:
      - api-data:/app/data    # JSON config files
      - api-logs:/app/logs    # Serilog output

Related Skills

See the dotnet skill for .NET 10 SDK configuration in Dockerfiles
See the aspnet-core skill for API container configuration
See the serilog skill for log volume configuration

---name: docker-10description: Configures containerization with Docker and Docker Compose for VanDaemon. Use when: building containers, configuring docker-compose, deploying to Docker environments, troubleshooting container networking, or setting up multi-container applications.--- # Docker Skill VanDaemon uses a multi-container architecture with separate API and Web containers for local development, plus a combined single-container deployment for Fly.io. The API runs on .NET 10, the Web frontend uses nginx to serve Blazor WASM static files and proxy API/WebSocket requests. Data persists via Docker volumes for JSON file storage. ## Quick Start ### Start Development Environment ```bash # From solution root docker compose up -d # View logs docker compose logs -f # Rebuild after code changes docker compose up --build ``` ### Access Points | Service | URL | Purpose | |---------|-----|---------| | Web UI | http://localhost:8080 | Blazor WASM frontend | | API | http://localhost:5000 | REST API + Swagger | | Health | http://localhost:5000/health | Container health check | | SignalR | ws://localhost:5000/hubs/telemetry | Real-time updates | ## Key Concepts | Concept | Usage | Example | |---------|-------|---------| | Multi-stage builds | Minimize image size | `FROM sdk AS build` → `FROM aspnet AS final` | | Health checks | Container orchestration | `HEALTHCHECK CMD curl /health` | | Volume mounts | Persist JSON data | `api-data:/app/data` | | Bridge network | Inter-container comms | `http://api:80` not `localhost:5000` | | Supervisor | Multi-process container | Combined nginx + API for Fly.io | ## Common Patterns ### Container Networking **When:** Containers need to communicate ```yaml # docker-compose.yml services: web: depends_on: api: condition: service_healthy # Use container name, not localhost environment: - API_BASE_URL=http://api:80 ``` ### Volume Persistence **When:** Data must survive container restarts ```yaml volumes: api-data: api-logs: services: api: volumes: - api-data:/app/data # JSON config files - api-logs:/app/logs # Serilog output ``` ## See Also - [docker](references/docker.md) - [ci-cd](references/ci-cd.md) - [deployment](references/deployment.md) - [monitoring](references/monitoring.md) ## Related Skills - See the **dotnet** skill for .NET 10 SDK configuration in Dockerfiles - See the **aspnet-core** skill for API container configuration - See the **serilog** skill for log volume configuration

Frequently asked questions