Add Docker image documentation and workflow

.github/workflows/docker.yml

@@ -0,0 +1,47 @@
+name: Docker Build and Push
+
+on:
+  push:
+    branches: [ main ]
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Log in to Container Registry
+      uses: docker/login-action@v3
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Extract metadata
+      id: meta
+      uses: docker/metadata-action@v5
+      with:
+        images: ghcr.io/${{ github.repository }}
+        tags: |
+          type=raw,value=latest,enable={{is_default_branch}}
+          type=sha,prefix=main-{{date 'YYYYMMDD'}}-,enable={{is_default_branch}}
+
+    - name: Build and push Docker image
+      uses: docker/build-push-action@v5
+      with:
+        context: .
+        file: ./Dockerfile
+        platforms: linux/amd64,linux/arm64
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+        cache-from: type=gha
+        cache-to: type=gha,mode=max

README.md

@@ -417,6 +417,24 @@ The service can be configured using environment variables:
 | `MCP_REGISTRY_SEED_IMPORT`           | Import `seed.json` on first run | `true` |
 | `MCP_REGISTRY_SERVER_ADDRESS`        | Listen address for the server | `:8080` |
 
+## Pre-built Docker Images
+
+Pre-built Docker images are automatically published to GitHub Container Registry on each release and main branch commit:
+
+```bash
+# Run latest from main branch
+docker run -p 8080:8080 ghcr.io/modelcontextprotocol/registry:latest
+
+# Run specific commit build
+docker run -p 8080:8080 ghcr.io/modelcontextprotocol/registry:main-20250806-a1b2c3d
+```
+
+**Available image tags:**
+- `latest` - Latest commit from main branch
+- `main-<date>-<sha>` - Specific commit builds
+
+**Configuration:** The Docker images support all environment variables listed in the [Configuration](#configuration) section. For production deployments, you'll need to configure the database connection and other settings via environment variables.
+
 ## License
 
 See the [LICENSE](LICENSE) file for details.