feat: complete OCI registry implementation with docker push/pull support

A lightweight OCI (Open Container Initiative) registry implementation written in Go.

README.md

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+# Cluster - OCI Registry
+
+A lightweight OCI (Open Container Initiative) registry implementation written in Go using Fiber v3.
+
+## Features
+
+- OCI Registry API v2 compliant
+- Blob upload/download with chunked upload support
+- Manifest handling (Docker and OCI formats)
+- Tag management and catalog listing
+- SQLite database for metadata storage
+- File system storage for blobs and manifests
+- RESTful API v1 for image management
+
+## Architecture
+
+- **main.go**: Application entry point
+- **api/**: API route definitions
+- **handler/**: HTTP request handlers
+- **controller/**: Business logic controllers
+- **internal/**: Internal packages (config, database, middleware, model, rerr, storage)
+
+## Development
+
+### Backend (Go)
+
+```bash
+# Build
+go mod tidy
+go build -o cluster .
+
+# Run
+./cluster -debug -address 0.0.0.0:8080 -data-dir ./x-storage
+
+# Or use Makefile
+make build
+make run
+```
+
+### Frontend (React/TypeScript)
+
+```bash
+cd frontend
+
+# Install dependencies (requires pnpm)
+pnpm install
+
+# Approve build scripts (required for esbuild)
+pnpm approve-builds
+
+# Development server
+pnpm dev
+
+# Build for production
+pnpm run build
+```
+
+**Note**: This project uses `pnpm` as the package manager. Install it if needed:
+```bash
+npm install -g pnpm
+# or
+curl -fsSL https://get.pnpm.io/install.sh | sh -
+```
+
+## API Endpoints
+
+### OCI Registry API v2
+
+- `GET /v2/` - Version check
+- `POST /v2/{repo}/blobs/uploads/` - Start blob upload
+- `PATCH /v2/{repo}/blobs/uploads/{uuid}` - Upload blob chunk
+- `PUT /v2/{repo}/blobs/uploads/{uuid}?digest={digest}` - Complete blob upload
+- `GET /v2/{repo}/blobs/{digest}` - Get blob
+- `HEAD /v2/{repo}/blobs/{digest}` - Check blob existence
+- `PUT /v2/{repo}/manifests/{tag}` - Put manifest
+- `GET /v2/{repo}/manifests/{tag}` - Get manifest
+- `DELETE /v2/{repo}/manifests/{tag}` - Delete manifest
+- `GET /v2/{repo}/tags/list` - List tags
+- `GET /v2/_catalog` - List repositories
+
+### API v1
+
+- `GET /api/v1/registry/image/list` - List images
+
+## Configuration
+
+- `-debug`: Enable debug logging
+- `-address`: Server address (default: 0.0.0.0:8080)
+- `-data-dir`: Data directory for storage (default: ./x-storage)
+
+## License
+
+[Add your license here]