Update docker-image.yml

.github/workflows/docker-image.yml

@@ -3,32 +3,27 @@ name: Docker Build and Test
 on:
   push:
     branches:
-      - main
+      - master
   pull_request:
     branches:
-      - main
+      - master
 
 jobs:
   docker-build:
     runs-on: ubuntu-latest
 
     steps:
-      # 1. 저장소 체크아웃
       - name: Checkout repository
         uses: actions/checkout@v3
 
-      # 2. Docker 빌드
       - name: Build Docker image
         run: |
           docker build -t onxxim-test .
 
-      # 3. Docker 빌드 테스트 (빌드 성공 여부 확인)
       - name: Test Docker image
         run: |
           docker run --rm onxxim-test echo "Docker build successful!"
 
-      # 4. (선택 사항) 캐시 설정
-      # Docker 이미지 캐싱으로 빌드 시간을 줄일 수 있음
       - name: Cache Docker layers
         uses: actions/cache@v3
         with: