fix: 도커 빌드 명령어 수정

Author: Gwonyeong

.github/workflows/auto-cd(prod).yaml

@@ -56,7 +56,7 @@ jobs:
 
       - name: aws ecr build
         run: |
-          docker build -f ${{ env.DOCKER_FILE }} -e DATABASE_URL=${{ env.SERVER_DATABASE_URL }} -t ${{ secrets.AWS_ECR_URI }}/choosetale:backend${{ env.DOCKER_IMAGE_TAG }} .
+          docker build -f ${{ env.DOCKER_FILE }}  -t ${{ secrets.AWS_ECR_URI }}/choosetale:backend${{ env.DOCKER_IMAGE_TAG }} .
 
       - name: aws ecr push
         run: |