Fix SIGPIPE issue with 3-step deployment

- Separate tar → scp → unpack to avoid pipe failures
- Add SSH stability options (ConnectTimeout, ServerAliveInterval)
- Clean up temporary files after deployment
- Prevents Exit code 141 (SIGPIPE) errors
- Maintains atomic swap and backup functionality

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.github/workflows/deploy.yml

@@ -56,9 +56,15 @@ jobs:
           ssh -p ${{ secrets.NAS_PORT }} admin@${{ secrets.NAS_HOST }} \
             "ls -la /var/run/docker.sock && id"
 
+      - name: Create deployment archive
+        run: tar czf deploy.tar.gz --exclude='.git' .
+
+      - name: Copy archive to NAS
+        run: scp -o ConnectTimeout=10 -o ServerAliveInterval=60 -P ${{ secrets.NAS_PORT }} deploy.tar.gz admin@${{ secrets.NAS_HOST }}:/tmp/
+
       - name: Deploy with atomic swap
         run: |
-          tar czf - --exclude='.git' . | ssh -p ${{ secrets.NAS_PORT }} admin@${{ secrets.NAS_HOST }} bash -s << 'EOF'
+          ssh -o ConnectTimeout=10 -o ServerAliveInterval=60 -p ${{ secrets.NAS_PORT }} admin@${{ secrets.NAS_HOST }} << 'EOF'
             set -euo pipefail
 
             DEPLOY=/volume1/homes/admin/nginx-infra
@@ -66,7 +72,7 @@ jobs:
             BACKUP=${DEPLOY}-backup-$(date +%Y%m%d%H%M%S)
 
             # 1) tar로 임시 디렉터리에 풀기
-            cd "$TMPDIR" && tar xzf -
+            cd "$TMPDIR" && tar xzf /tmp/deploy.tar.gz
 
             # 2) 기존 배포물을 백업
             if [ -d "$DEPLOY" ]; then
@@ -85,4 +91,7 @@ jobs:
             cd "$DEPLOY"
             docker-compose down 2>/dev/null || true
             docker-compose up -d --build
+
+            # 6) 임시 파일 정리
+            rm -f /tmp/deploy.tar.gz
           EOF