Chore: ci-cd.yml 수정 (dev 머지 준비)

Author: lunarbae628

.github/workflows/ci-cd.yml

@@ -1,8 +1,11 @@
 name: CI/CD — Backend (Build → Push → Deploy)
 
 on:
+  # dev에 머지 전 ci push 대상 브랜치 중첩 적용 (release, dev)
   push:
-    branches: [ release ]
+    branches: [ release, dev ]
+  pull_request:
+    branches: [ dev ]
   workflow_dispatch: {}
 
 jobs:
@@ -57,14 +60,21 @@ jobs:
             echo "No Dockerfile found"; exit 1
           fi
 
+      - name: Build image (PR only)
+        if: github.event_name == 'pull_request'
+        run:  |
+          docker build -f "${{ steps.df.outputs.path }}" -t sanity-check:pr "${{ steps.df.outputs.ctx }}"
+
       - name: Log in to GHCR
+        if: github.event_name == 'push'
         uses: docker/login-action@v3
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build & Push image
+        if: github.event_name == 'push'
         run: |
           GIT_SHA=${{ github.sha }}
           docker build -f "${{ steps.df.outputs.path }}" -t $IMAGE:release -t $IMAGE:$GIT_SHA "${{ steps.df.outputs.ctx }}"
@@ -73,7 +83,8 @@ jobs:
 
   deploy:
     needs: build-and-push
-    if: github.ref == 'refs/heads/release' && needs.build-and-push.result == 'success'
+    # dev에 머지 전 cd 대상 브랜치 중첩 적용 (release, dev)
+    if: github.event_name == 'push' && (github.ref == 'refs/heads/release' || github.ref == 'refs/heads/dev') && needs.build-and-push.result == 'success'
     runs-on: ubuntu-latest
     steps:
       - name: Deploy