fix : CI 과정에 더미 prefix 값 추가

Author: EpicFn

.github/workflows/test-server-ci.yml

@@ -90,6 +90,7 @@ jobs:
           AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
           AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
           AWS_S3_BUCKET_NAME: ${{ secrets.AWS_S3_BUCKET_NAME }}
+          AWS_S3_PREFIX: test/
           SENTRY_DSN: ${{ secrets.SENTRY_DSN }}
           JWT_SECRET_KEY: ${{ secrets.JWT_SECRET_KEY }}
           JWT_ACCESS_TOKEN_VALIDITY: ${{ secrets.JWT_ACCESS_TOKEN_VALIDITY }}