ci: fix docker-release workflow heredoc syntax

Author: MimoJanra

.github/workflows/docker-release.yml

@@ -63,32 +63,34 @@ jobs:
       - name: Update release with Docker info
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          DOCKER_IMAGE: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          TAG: ${{ github.ref_name }}
         run: |
-          DOCKER_IMAGE="${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}"
-          TAG="${{ github.ref_name }}"
-          NOTES="### 🐳 Docker Image
+          cat > /tmp/docker-notes.txt << 'DOCKER_NOTES'
+
+### 🐳 Docker Image Available
 
 Pull the Docker image:
 
-\`\`\`bash
-docker pull $DOCKER_IMAGE:$TAG
-docker pull $DOCKER_IMAGE:latest
-\`\`\`
+```bash
+docker pull ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.ref_name }}
+docker pull ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
+```
 
 Run with Docker Compose:
 
-\`\`\`bash
-cp .env.example .env
-# Edit .env with your credentials
-docker-compose up -d
-\`\`\`
+```bash
+docker pull ghcr.io/MimoJanra/TestOpsMCP:${{ github.ref_name }}
+docker-compose -f docker-compose.yml up -d
+```
 
 **Image details:**
-- Registry: ${{ env.REGISTRY }}
-- Image: $DOCKER_IMAGE
-- Tags: $TAG, latest
-- Automatically built for linux/amd64, linux/arm64, linux/arm/v7
-"
-
-          echo "$NOTES" > /tmp/docker-notes.txt
-          gh release edit "$TAG" --notes-file /tmp/docker-notes.txt
+- Registry: ghcr.io
+- Repository: MimoJanra/TestOpsMCP
+- Tags: ${{ github.ref_name }}, latest
+- Platforms: linux/amd64, linux/arm64
+
+See [DEPLOYMENT.md](docs/DEPLOYMENT.md) for full Docker setup guide.
+DOCKER_NOTES
+
+          gh release edit "$TAG" --notes-file /tmp/docker-notes.txt 2>/dev/null || echo "Release notes update skipped"