fix: 도커 수정

Author: cobocho

.github/workflows/deploy.yml

@@ -42,16 +42,22 @@ jobs:
         run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
 
       - name: Build and push Docker image
+        shell: bash
+        env:
+          SECRET_KEY: ${{ secrets.SECRET_KEY }}
         run: |
+          set -euo pipefail
+
           IMAGE_NAME=ghcr.io/${{ github.repository_owner }}/blog
           IMAGE_TAG=$(date +%Y%m%d%H%M%S)
-          echo "IMAGE_TAG=$IMAGE_TAG" >> $GITHUB_ENV
+          echo "IMAGE_TAG=$IMAGE_TAG" >> "$GITHUB_ENV"
 
-          printf "%s" "${{ secrets.SECRET_KEY }}" > secret_key.txt
+          # ✅ env로 받은 값을 파일로 저장 (YAML 문제 없음)
+          printf '%s' "$SECRET_KEY" > secret_key.txt
 
           docker buildx build \
             --secret id=SECRET_KEY,src=secret_key.txt \
-            -t $IMAGE_NAME:$IMAGE_TAG \
+            -t "$IMAGE_NAME:$IMAGE_TAG" \
             --push .
 
           rm -f secret_key.txt

Dockerfile

@@ -1,3 +1,5 @@
+# syntax=docker/dockerfile:1.5
+
 FROM node:20-alpine AS deps
 WORKDIR /app