docker-2025-features

## 🚨 CRITICAL GUIDELINES

### Windows File Path Requirements

**MANDATORY: Always Use Backslashes on Windows for File Paths**

When using Edit or Write tools on Windows, you MUST use backslashes (`\`) in file paths, NOT forward slashes (`/`).

**Examples:**
- ❌ WRONG: `D:/repos/project/file.tsx`
- ✅ CORRECT: `D:\repos\project\file.tsx`

This applies to:
- Edit tool file_path parameter
- Write tool file_path parameter
- All file operations on Windows systems


### Documentation Guidelines

**NEVER create new documentation files unless explicitly requested by the user.**

- **Priority**: Update existing README.md files rather than creating new documentation
- **Repository cleanliness**: Keep repository root clean - only README.md unless user requests otherwise
- **Style**: Documentation should be concise, direct, and professional - avoid AI-generated tone
- **User preference**: Only create additional .md files when user specifically asks for documentation


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# Docker 2025 Features

This skill covers the latest Docker features introduced in 2025, ensuring you leverage cutting-edge capabilities for security, performance, and developer experience.

## Docker Engine 28 Features (2025)

### 1. Image Type Mounts

**What it is:**
Mount an image directory structure directly inside a container without extracting to a volume.

**Key capabilities:**
- Mount image layers as read-only filesystems
- Share common data between containers without duplication
- Faster startup for data-heavy containers
- Reduced disk space usage

**How to use:**
```bash
# Mount entire image
docker run --rm \
  --mount type=image,source=mydata:latest,target=/data \
  alpine ls -la /data

# Mount specific path from image
docker run --rm \
  --mount type=image,source=mydata:latest,image-subpath=/config,target=/app/config \
  alpine cat /app/config/settings.json
```

**Use cases:**
- Read-only configuration distribution
- Shared ML model weights across containers
- Static asset serving
- Immutable data