feat: blue green 무중단 배포 스크립트

.github/workflows/backend-prod.yml

@@ -70,15 +70,15 @@ jobs:
         run: |
           echo "Checking if any container is running on ports 8080 or 8081..."
           CURRENT_PORT=$(sudo docker ps --format "{{.Names}} {{.Ports}}" | grep "***-backend" | grep -o '8080\|8081' || echo "")
-          
+          echo "CURRENT_PORT on port $CURRENT_PORT."
           # CURRENT_PORT가 빈 문자열이거나 8081인 경우
           if [ -z "$CURRENT_PORT" ] || [ "$CURRENT_PORT" == "8081" ]; then
+            echo "null or 8081"
             NEXT_PORT=8080
           else
+            echo "8080"
             NEXT_PORT=8081
           fi
-          
-          echo "Next container will run on port $NEXT_PORT."
 
           echo "Next container will run on port $NEXT_PORT."
           echo "::set-output name=next_port::$NEXT_PORT"