diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 00000000..c481e17e
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,4 @@
+# Force LF for shell scripts and Gradle wrapper so they work in Linux containers
+# regardless of host autocrlf settings.
+*.sh           text eol=lf
+gradlew        text eol=lf
diff --git a/docker/dev/backend-spring.Dockerfile b/docker/dev/backend-spring.Dockerfile
index 65ead131..c7fc46a4 100644
--- a/docker/dev/backend-spring.Dockerfile
+++ b/docker/dev/backend-spring.Dockerfile
@@ -24,4 +24,4 @@ EXPOSE 8081
 # 백그라운드: `./gradlew classes -t` 가 .java 변경 감지해 .class 재컴파일
 # 포그라운드: `./gradlew bootRun` 이 앱 실행, DevTools 가 build/classes 변경 감지해 자동 리로드
 # 주의: --continuous 는 gradle daemon 필요 → --no-daemon 제거
-CMD ["sh", "-c", "./gradlew classes -t & exec ./gradlew bootRun"]
+CMD ["sh", "-c", "sh ./gradlew classes -t & exec sh ./gradlew bootRun"]