Merge pull request #33033 from YuPengZTE/devReadAll

check err
Upstream-commit: b61ffbfb527cf9d9998b8d2c514749a51e7640ae
Component: engine

components/engine/builder/remotecontext/detect.go

@@ -125,6 +125,9 @@ func removeDockerfile(c modifiableContext, filesToRemove ...string) error {
 		return err
 	}
 	excludes, err := dockerignore.ReadAll(f)
+	if err != nil {
+		return err
+	}
 	f.Close()
 	filesToRemove = append([]string{".dockerignore"}, filesToRemove...)
 	for _, fileToRemove := range filesToRemove {