[Weekly/10/Chore/Deploy] push일 때만 Deploy되도록 수정 (#83)

* chore: push일 때만 Deploy되도록 수정

* chore: push일 때만 Docker push 되도록 수정

.github/workflows/gradle.yml

@@ -38,21 +38,25 @@ jobs:
           ./gradlew clean build -x test
 
       - name: Docker Hub Login
+        if: github.event_name == 'push'
         uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_TOKEN }}
 
       - name: Docker Build
+        if: github.event_name == 'push'
         run: docker build -f Dockerfile --build-arg DEPENDENCY=build/dependency -t ${{ secrets.DOCKER_REPO_FULLNAME }} .
 
       - name: Docker Push
+        if: github.event_name == 'push'
         run: docker push ${{ secrets.DOCKER_REPO_FULLNAME }}
 
   ## 2단계: 서버에 배포
   Deploy:
     runs-on: ubuntu-22.04
     needs: Build
+    if: github.event_name == 'push'
     steps:
       - name: Pull New Docker Image
         uses: appleboy/ssh-action@master